Question

using (x+a) (x+b) = x²+(a+b) x+ab identity solve (4x+5) (4x-1)​

Answer 1

Answer : 16x² + 16x - 5

Step-by-step explanation:

x = 4x

a = 5

b = -1

(4x)² + [5 + (-1)] 4x + (5)(-1)

16x² + 16x -5

Answer 2

Answer:

16x² + 16x -5

Step-by-step explanation:

(4x)² + (5- 1)4x +5×(-1)

16x²+16x -5