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If 2x=3y-5, then find the value of 8x3-27y3+90xy+125 |
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Answer» Answer: 0 Step-by-step explanation: 2x-3y=-5 Cube on both SIDES (2x-3y)^3=(-5)^3 (a-b)^3=a^3-b^3-3ab(a-b) 8x^3-9y^3-3(2x)(3y)(2x-3y)=-125 But GIVEN 2x-3y=-5 8x^3-9y^3-18xy(-5)=-125 8x^3-9y^3+90xy+125=0 |
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