4(a - b)2 - 12(a - b) +9
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Answer: I hope it will help u...and u can change the numericals...
Step-by-step explanation:
the first one 9(a+b)^2 =9(a^2+2ab+b^2) =9a^2+18ab+9b^2 In the second one -12(a^2-b^2) = -12((a+b)(a-b)) = -12(2a) =-24a In the third one 4(a-b)^2 =4(a^2+b^2-2ab) =4a^2+4b^2-8ab Summing like terms 9a^2+4a^2+9b^2+4b^2+18ab-8ab-24a =13a^2+13b^2+10ab-24a
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Answer:
the first one 9(a+b)^2 =9(a^2+2ab+b^2) =9a^2+18ab+9b^2 In the second one -12(a^2-b^2) = -12((a+b)(a-b)) = -12(2a) =-24a In the third one 4(a-b)^2 =4(a^2+b^2-2ab) =4a^2+4b^2-8ab Summing like terms 9a^2+4a^2+9b^2+4b^2+18ab-8ab-24a =13a^2+13b^2+10ab-24a
Step-by-step explanation:
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