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If [8(x + y)3 – 27(x – y)3] ÷ (5y – x) = Ax2 + Bxy + Cy2, then the value of (A2 - 2B + 3C)...
If x + y + z = 10 and x² + y² + z² = 36, then what is the value of x y + y z + z x?
If 2x + y = 15 and xy = 18, then the value of (4x² - y²)
If (3x - y) = 3, xy = (2/3), then find the value of {x3 - (y3/27)}
If the sum of three numbers is zero, then which of the options below will always be equal to the value of the sum of the cubes of those numbers?
If 4x² + y² = 25 and x y = 6, then find the value of 2x + y?