Question

Subtract: a) 5x2- 4y2+ 6y -3 and 7x2 -4xy + 8y2 + 5x-3y

Answer 1

Answer:

$5 {x}^{2} - 4 {y}^{2} + 6y - 3 - (7 {x}^{2} - 4xy + 8 {y}^{2} + 5x - 3y) \\ \\ = 5 {x}^{2} - 4 {y}^{2} + 6y - 3 - 7 {x}^{2} + 4xy - 8 {y}^{2} + 5x + 3y \\ \\ = 5 {x}^{2} - 7 {x}^{2} - 4 {y}^{2} - 8 {y}^{2} + 6y + 3y + 5x - 3 + 4xy \\ \\ = - 3 {x}^{2} - 12 {y}^{2} + 9y + 5x - 3 + 4xy$

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Answer 2

Answer:

77+88+888+687+788+7878+7878+677+88