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Mathematics, 24.11.2020 14:10 BreBreDoeCCx

Simplify: -2(a-3b)-4a+7b expand and simplify: 3(7x-2y)-5(2x+y), 4h(k-3h)-6k(h-9k), (5b-7)(3+6b), (7b+3)(5-2p)-(4-3p)(p-1)
factorise: a²+5a-6, 12a²-19d+5
factorise using identities of algebra:4k ²+12k+9,81a ²-49b ²

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Simplify: -2(a-3b)-4a+7b expand and simplify: 3(7x-2y)-5(2x+y), 4h(k-3h)-6k(h-9k), (5b-7)(3+6b), (7...
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