Question

1. Use suitable identities to find the following products
(i) (x + 5) (x + 2) (i) (x - 5)(x - 5) (iii) (3x + 2)(3x - 2)
(iv)
(v) (1+x) (1 + x)
2​

Answer 1

Step-by-step explanation:

(1) x (x+2) +5 (x+2) = x^2 + 2x + 5x + 10

= x^2 + 7x + 10

(2) (x-5)^2 = x^2 - 2× x× 5 + 5^2

= ×^2 - 10x + 25

(3) (3x)^2 - (2)^2 = 9x^2 - 4

(5) (1+x)^2 = (1)^2 + 2×1×x + (x)^2

= 1 + 2x + x^2

Answer 2

Answer:

use them and get the answer...

your answer is here...

i) (x + 5) (x + 2)

x² + 2x + 5x + 10

x(x + 2) + 5 (x + 2)

x = -5 : x = -2

ii)(x - 5)(x - 5)

apply the above formula....

iii) same as (I)

iv) no question available...

v) same as (I)