Answer the maths question
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Step-by-step explanation:
1. 64x sq.+81y sq.+144xy
64*2*2+81*4/3*4/3+144*2*4/3
256+108+48*2*4=384
256+108+384=748
2. 81x sq.+16ysq. -72xy
81*-2*-2+16*3*3-72*-2*3
324+144+432
900
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