8. Expand and simplify each of the following
expressions.
(a) 5 + (x + 1)(x + 3)
(b) 3x + (x + 7)(2x - 1)
please answer urgently
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Answer:
a) 5 + (x + 1 ) (x + 3 )
5+ x( x + 3 ) +1 (x + 3 )
5+ x^2 + 3x + x +3
x^2 +. 4x + 8
b) 3x + ( x + 7 ) ( 2x - 1)
3x + x ( 2x - 1 ) + 7 ( 2x - 1)
3x + 2x^2 - x + 14 x - 7
2x^2 -x+14x+3x -7
2x ^2 +16x - 7
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