3 years ago

If B=3x^{2}-x+3 and A=x-6, find an expression that equals 2B+3A in standard form.

Mathematics

1 answer:

Ivan3 years ago

7 0

9514 1404 393

Answer:

6x^2 +x -12

Step-by-step explanation:

Substitute for A and B and collect terms.

2B +3A

= 2(3x^2 -x +3) +3(x -6) . . . . substitute for A and B

= 6x^2 -2x +6 +3x -18 . . . . . eliminate parentheses

= 6x^2 +x -12 . . . . . . . . . . . . collect terms

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