expand (-2a+4b-56)^2
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(-2a+4b-56)^2
= (-2a)^2 + (4b)^2 + (-56)^2 + 2×(-2a)×4b + 2×4b×(-56) + 2×(-56)×(-2a)
= 4a^2 + 16b^2 + 3136 -16ab - 448b + 224a
Hope it helps
= (-2a)^2 + (4b)^2 + (-56)^2 + 2×(-2a)×4b + 2×4b×(-56) + 2×(-56)×(-2a)
= 4a^2 + 16b^2 + 3136 -16ab - 448b + 224a
Hope it helps
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