Subtract 12ab -10b^2-18a^2 and 9ab+12b^2+14a^2 from the sun of ab+2b^2and 3b^2-a^2
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Answer:
20ab-3b2-3a2 is the answer
Step-by-step explanation:
12ab-10b2-18a2+9ab+12b2+14a2
=21ab+2b2-4a2
ab+2b2+3b2-a2
=5b2-a2+ab
subtracting these two we get
21ab+2b2-4a2-(5b2-a2+ab)
=21ab+2b2-4a2-5b2+a2-ab
=20ab-3b2-3a2
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