Question

Evaluate each of the following using identities:
(a) (2x+ 1)^2
(b) (4x+3y) (4x-3y)
(c) (a+b-4) (a+b+4)
(d) [3.5 x^2+0.6y^2] [3.5 x^2-0.6y^2]
(e) (509)^2
(f) (199)^2
(g) 991×1009
(h) (0.97)^2



Pls give all the answers at one time otherwise I will report you.

Answer 1

Step-by-step explanation:

a) (2x+1)²=. (x+y)²=. x²+y²+2xy

(2x)²+(1)²+2(2x)(1)=

4x²+1 +4x Ans

b) (4x+3y)(4x-3y)= (x+y)(x-y)= x²-y²

(4x)²-(3y)²=. 16x²-9y². Ans

c) (a+b-4)(a+b+4)= (x+y+z)(x+y+z)= x²+y²+z²+xy+yz+zx=

(a)²+(b)²+(4)² +(a)(b)+(b)(-4)+(-4)(a)=

a²+b²+16+ab-4b-4a Ans

Hope it's clear to you

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