Question

expand 1.(4x+5) (4x+7)
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Answer 1

Answer:

(4x +5) (4x+7)

4x(4x+7) +5(4x+7)

16x²+28x+20x+35

16x²+48x+35

16x²+28x+20x+35

4x(4x+7) +5(4x+7)

(4x+5) (4x+7) = 0

therefore 4x+5=0 or 4x +7=0

4x=-5 Or 4x=-7

x=-5/4 Or x=-7/4

Answer 2

$\huge\bold\pink{Answer}$

• x=-5/4 Or
• x=-7/4