use suitable Identity find
(a) (4x+5)(4x+1)
(b)(2x+3y)
sweety70:
is the (b) question right..??
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(a) (4x+5)(4x+1)
(x+a)(x+b) =x²+x(a+b)+ab
x=4x a=5 b=1
(4x)² +4x(5+1)+5x1
16x²+20x+4x+5
16x²+24x+5
hope it helps...
(x+a)(x+b) =x²+x(a+b)+ab
x=4x a=5 b=1
(4x)² +4x(5+1)+5x1
16x²+20x+4x+5
16x²+24x+5
hope it helps...
3rd line put , to separate terms
From 4th line to last line put = symbol
sorry I couldn't edit the answer now
In 5th line middle term 4x*6
ohh
oki
thanks
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