Q.5 Do as directed. 1. Simplify: 7x²+ x(x + y - 1) - y(2x + 4) - 3(x - y -4)
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8x^2 - xy - 4x - y + 12
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7x²+ x(x + y - 1) - y(2x + 4) - 3(x - y -4)
= 7x^2 + x^2 + xy - x -2xy - 4y - 3x - 3y + 12
= 8x^2 - xy - 4x - y + 12
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