Solve for x and y if 2(7x+4y)=xy and 2(3x+2y)=3xy
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(i) x3- 2x2y + 3xy2- y3+ 2x3- 5xy2 + 3x2y- 4y3 ... x + 5x + 3x - 3y + 7y - 2y - 2z - 8z + 5z ... If P = 7x2 + 5xy − 9y2, Q = 4y2 − 3x2 − 6xy and R = −4x2 + xy + 5y2, show that P + Q + R = 0
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Kar le cheating.
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Kar le cheating
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