Question

(4+5x) (4-3x) answer
using (x+a) (x+b) = x²+(a+b)x + ab​

Answer 1

Explanation:

$(4+5x)(4-3x)$

=$(4)^2 + (5x-3x)4 +(5x)(-3x)$

$=16+(2x)(4)-15x$

$= -15x^2 +8x +16$

$=-(15x^2 -8x -16)$

Answer: -15x^2 +8x+16 OR -(15x^2 -8x -16)

I hope this helps. :D