using identity (x+a) (x+b), find (4x+3) (4x+5)
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1
Answer:
Q.) (4x + 5 ) ( 4x + 3 )
》 4x^2 + ( 5 + 3 ) 4x + 5 × 3 { Identity 4 } ( x + a ) (x +b)
x^2 + ( a + b ) x + ab
》 4x^2 + 8 × 4x + 15
》 16x^2 + 32x + 15 Ans.
Step-by-step explanation:
Answered by
1
Answer:
31 +8x
Step-by-step explanation:
(x+a )( x+b) = x^2+x(a+b )+ (a) (b)
(4x+3) (4x+5) = 4^2 +x (3+5) +(3) (5)
= 16 + 8x +15
= 31 + 8x
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