Question

SOLVE THIS STEP BY STEP : -
x^2-9=11

Answer 1

Answer: x=40

Step-by-step explanation:

Rearrange:

Rearrange the equation by subtracting what is to the right of the equal sign from both sides of the equation :

x/2-9-(11)=0

Step 1 :

x

Simplify —

2

Equation at the end of step 1:

x

(— - 9) - 11 = 0

2

Step 2 :

Rewriting the whole as an Equivalent Fraction

2.1 Subtracting a whole from a fraction

Rewrite the whole as a fraction using 2 as the denominator :

9 9 • 2

9 = — = —————

1 2

Adding fractions that have a common denominator :

2.2 Adding up the two equivalent fractions

Add the two equivalent fractions which now have a common denominator

Combine the numerators together, put the sum or difference over the common denominator then reduce to lowest terms if possible:

x - (9 • 2) x - 18

——————————— = ——————

2 2

Equation at the end of step 2 :

(x - 18)

———————— - 11 = 0

2

Step 3 :

Rewriting the whole as an Equivalent Fraction :

3.1 Subtracting a whole from a fraction

Rewrite the whole as a fraction using 2 as the denominator :

11 11 • 2

11 = —— = ——————

1 2

Adding fractions that have a common denominator :

3.2 Adding up the two equivalent fractions

(x-18) - (11 • 2) x - 40

————————————————— = ——————

2 2

Equation at the end of step 3 :

x - 40

—————— = 0

2

Step 4 :

When a fraction equals zero :

4.1 When a fraction equals zero ...

Where a fraction equals zero, its numerator, the part which is above the fraction line, must equal zero.

Now,to get rid of the denominator, Tiger multiplys both sides of the equation by the denominator.

Here's how:

x-40

———— • 2 = 0 • 2

2

Now, on the left hand side, the 2 cancels out the denominator, while, on the right hand side, zero times anything is still zero.

The equation now takes the shape :

x-40 = 0

Solving a Single Variable Equation:

Solving a Single Variable Equation: 4.2 solve :

x-40 = 0

Add 40 to both sides of the equation :

x = 40

Answer 2

Answer:

Step-by-step explanation:

Rearrange:

Rearrange the equation by subtracting what is to the right of the equal sign from both sides of the equation :

x/2-9-(11)=0

Step 1 :

x

Simplify —

2

Equation at the end of step 1:

x

(— - 9) - 11 = 0

2

Step 2 :

Rewriting the whole as an Equivalent Fraction

2.1 Subtracting a whole from a fraction

Rewrite the whole as a fraction using 2 as the denominator :

9 9 • 2

9 = — = —————

1 2

Adding fractions that have a common denominator :

2.2 Adding up the two equivalent fractions

Add the two equivalent fractions which now have a common denominator

Combine the numerators together, put the sum or difference over the common denominator then reduce to lowest terms if possible:

x - (9 • 2) x - 18

——————————— = ——————

2 2

Equation at the end of step 2 :

(x - 18)

———————— - 11 = 0

2

Step 3 :

Rewriting the whole as an Equivalent Fraction :

3.1 Subtracting a whole from a fraction

Rewrite the whole as a fraction using 2 as the denominator :

11 11 • 2

11 = —— = ——————

1 2

Adding fractions that have a common denominator :

3.2 Adding up the two equivalent fractions

(x-18) - (11 • 2) x - 40

————————————————— = ——————

2 2

Equation at the end of step 3 :

x - 40

—————— = 0

2

Step 4 :

When a fraction equals zero :

4.1 When a fraction equals zero ...

Where a fraction equals zero, its numerator, the part which is above the fraction line, must equal zero.

Now,to get rid of the denominator, Tiger multiplys both sides of the equation by the denominator.

Here's how:

x-40

———— • 2 = 0 • 2

2

Now, on the left hand side, the 2 cancels out the denominator, while, on the right hand side, zero times anything is still zero.

The equation now takes the shape :

x-40 = 0

Solving a Single Variable Equation:

Solving a Single Variable Equation: 4.2 solve :

x-40 = 0