If 2x + 3y = 13 and xy = 6, then the value of 8x3 + 27y3 is ___________?
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your answer is 793.
your answer is 793.
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2x + 3y = 13 (2x + 3y)^2 = 4x^2 + 12xy + 9y^2 = 169 4x^2 + 9y^2
= 169 - 12 * 6 = 97 8x^3+27y^3
= (2x + 3y)(4x^2 - 6xy + 9y^2)
= 13(97 - 36)
= 13 * 61
= 793
Pls mark as a brainlist
2x + 3y = 13 (2x + 3y)^2 = 4x^2 + 12xy + 9y^2 = 169 4x^2 + 9y^2
= 169 - 12 * 6 = 97 8x^3+27y^3
= (2x + 3y)(4x^2 - 6xy + 9y^2)
= 13(97 - 36)
= 13 * 61
= 793
Pls mark as a brainlist
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