Question

SECTION - A
1. Find the value of the expression a2 + 3a + 5, when a = 2. With identity
2. Find the product of 5 xży and – 2x2y2.
3. Simplify (2 x + a) (2x + a) - 4x2 - a2.​

Answer 1

Answer:

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Answer 2

Step-by-step explanation:

1). a^2+3a+5

a=2

(2)^2+3×2+5

4+6+5

15

2). 5xyz × -2x^2 y^2

-10x^3y^3z

3). (2x+a)(2x+a)-4x^2-a^2

= (2x+a)^2-4x^2-a^2

= 4x^2+a^2+4xa-4x^2-a^2

=4xa