Question

If A=9a^2-4ab+5b^2
B=-3a^2+2ab-b^2
Find 2A-B

Answer 1

Answer:

15a^2-10ab+11b^2

Step-by-step explanation:

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Answer 2

Step-by-step explanation:

2A-B

2(9a^2-4ab+5b^2)=2A

18a^2-8ab+10b^2=2A

-3a^2+2ab-b^2=B

2A-B

18a^2-8ab+10b^2-(-3a^2+2ab-b^2)

18a^2-8ab+10b^2+3a^2-2ab+b^2

21a^2-10ab+11b^2