F(x)=(x+5)²(x-1)
=(x-1)(x²+10x+25)
=x²(x-1)+10x(x-1)+25(x-1)
=x³-x²+10x²-10x+25x-25
=x³+9x²+15x-25
First, combine the like terms:
-x+8=3
Then, isolate x:
-x=-5
Then, divide by -1:
x=5
Answer:
15/1 is proportional to 45/3
Step-by-step explanation:
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