What is 3k(-5k+21)+2(2.5k+90) <-- Confused please help
1 answer:
Use distributive prpoerty
a(b+c)=ab+ac
distribute each
3k(-5k+21)=-15k^2+63k
2(2.5k+90)=5k+180
so nowe we have
-15k^2+63k+5k+180
add like terms
-15k^2+68k+180
that is the answer
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