Question

1. Use suitable identities to find the following products:
(1) (x+4)(x+10)
(ii) (x+8) (x - 10)
3
3
(iv) (u2+ 2) (2-2.
(v) (3 - 2x) (3 + 2x)​

Answer 1

Step-by-step explanation:

1)

(x+4)(x+10)

x^2 +10x +4x +40

x^2 +14x +40

x^2+10x+4x+40

x (x+10) +4(x+10)

(x+4)(x+10)

2)

(x+8)(x-10)

x^2 -10x +8x -80

x(x-10)+8(x-10)

(x+8)(x-10)

4)

(u)(2+2)(2-2)

u(2^2-2^2)

u(4-4)

u(0)

0

5)

(3-2x)(3+2x)

(a-b)(a+b)=a^2-b^2

3^2 - (2x)^2

9-4x^2