Question

use suitable identities to find the following products
1:- (x+5)(x+2)
2:- (x-5)(x-5)
3:- (3x+2)(3x-2)
4:- (1+x)(1+x)​

Answer 1

EXPLAINED CLEARLY IN THE PICTURE

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Answer 2

Answer:

1: (x+5)(x+2)

a*b=ab

=> x^2+10+2x+5x

=x^2+7x+10

2: (x-5)(x-5)

a*a=a^2

=> (x-5)^2

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

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

x^2+25+10x

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

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

= (9x^2-4)

4: (1+x)(1+x)

a*a=a^2

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

Step-by-step explanation:

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