add 7a2 -5b2 +3,9a2-10+7b2
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Step-by-step explanation:
7a^2-5b^2+3+9a^2-10+7b^2
7a^2+9a^2-5b^2+7b^2+3-10
16a^2+2b^2-7
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1
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I hope this this helpful to you......
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