Question

If x² + px − 63 = ( x + 7 ) ( x − 9 ) , then p is ----------
16

-2

-16

2​

Answer 1

Answer:

-2

Step-by-step explanation:

first open the brackets

after opening you'll get x^2

cancel both x^2 and bith the 63

and you cna thennsolve it further

Answer 2

If x² + px − 63 = ( x + 7 ) ( x − 9 ) , then p is  -2

Given:

x² + px − 63 = ( x + 7 ) ( x − 9 )

To Find:

• Value of p

Solution:

Step 1:

Apply distributive property on RHS and simplify

x² + px − 63 = ( x + 7 ) ( x − 9 )

=>  x² + px − 63 = x (x - 9) + 7(x - 9)

=>  x² + px − 63 = x² - 9x + 7x - 63

Step 2:

Add like terms on RHS

x² + px − 63 = x² - 2x - 63

Step 3:

Cancel x² and - 63 from both sides

px = - 2x

Step 4:

Cancel x from both sides

p  = - 2

Value of p is -2.

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