Question

Solve the following using identity- (x+a)(x-a) or (x+a)(x+b) or (x-a)(x+b) or (x-a)(x-b)

Answer 1

(9) Given Equation is (3 - x^2)(5 + x^2).

We know that (a + b)(c + d) = ac + ad + bc + bd

3 * 5 + 3 * x^2 - 5 * x^2 - x^2 * x^2

15 + 3x^2 - 5x^2 - x^4

-x^4 - 2x^2 + 15.



(10) Given Equation is (6 - x)(x + 5)

6 * x + 6 * 5 - x * x - x * 5

6x + 30 - x^2 - 5x

-x^2 + x + 30.


Hope this helps!

Answer 2

Hi,

Please see the attached file!


Thanks