Question

(5 - 2x - 3y)(25 + 4x²+ 9y² + 10x - 6xy +15y)

Answer 1

$(5 - 2x - 3y)(25 + 4x {}^{2} + 9y {}^{2} + 10x + - 6xy + 15y) \\ (5 - 2x - 3y)(5 {}^{2} + ( - 2x) {}^{2} + ( - 3y) {}^{2} - (5)( - 2x) - ( - 2x)( - 3y) - ( - 3y)(5) \\ (5 - 2x - 3y)(125 + ( - 8x {}^{3} ) + ( - 27y {}^{3} ) - 3(5)( - 2x)( - 3y) \\ (5 - 2x - 3y)(125 - 8x {}^{3} - 27y {}^{3} - 90)$