Question

It is given that two linear equations -5p-q=15and -4p+q=3. Calculate the value of q
A) 4
B) 6
c)-5

d) -7

Answer 1

Answer:

Given Equation

x² + 5x - 6 = 0

To find

Discriminant (D)

Formula

D = b² - 4ac

Now Compare with

ax² + bx + c = 0

We get

a = 1 , b = 5 and c = -6

Put the value on formula

D=(5)² - 4(1)(-6)

D = 25 + 24

D = 49

Answer

D = 49

More Information

Now we Factorise the equation by using middle term splitting

We have

x² + 5x - 6 = 0

x² + 6x - x - 6 = 0

x(x + 6)-1(x + 6) = 0

(x -1)(x + 6)=0

x = 1 and x = -6

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