Question

using identity (x+a) (x+b), find (4x+3) (4x+5)​

Answer 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:

Answer 2

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