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A. multiply each expression. using foil method or vertical form
1. 5x( x + 3
2.-4x(x2 - 5× +10)
3.6×2(2x + 8)
4.(a + 8)(a + 4)
5.(2a -7)( a -8)
with solution po ​


Sagot :

Answer:

1. 5x*x+5x*3

=5x²+15x

2. -4x*x²+4x*5x-4x*10

=-4x³+20x²-40

3. 12(2x+8)

=12*2x+12*8

= 24x+96

4. a*a+a*4+8*a+8*4

= a²+4a+8a+32

= a²+12a+32

5. 2a*a-2a*8-7*a+7*8

= 2a²-16a-7a+56

=2a²-23a+56

note that * means multiply by and double negatives result in postives