Question

Find the product of (x + 7) (x-5) using the Identity (X + a) (x+b) = x² + (a+b)x + ab​

Answer 1

Step-by-step explanation:

(x + 7) (x-5)

by using (X + a) (x+b) = x² + (a+b)x + ab

x²+(7-5)x+7×(-5)

x²+2x-35.

Answer 2

Answer:

Here a is +7 and b is -5

putting values of a and b in identity

(x+a)(x+b)=x²+(a+b)x + ab

• x² +(7+(-5))x + 7×-5
• x² + 2x -35

by applying middle term splitting in above equation we get

• x²+7x-5x-35
• x(x+7)-5(x+7)
• (x+7) (x-5)

So, the product is (x+7)(x-5)

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