(2.5x+3y)(1.5x + 3y - 3) – InterviewSolution

1.

(2.5x+3y)(1.5x + 3y - 3)

Answer»

if sign changed when you solve the q. eg..+×- =-

(2.5×1.5)x*x + 2.5×3y - 2.5×3 - 3×1.5xy - 3*3y*y + 3*3y = 3.75x*x + 7.5y - 7.5 - 4.5xy - 9y*y + 9y = 3.75x*x + 16.5y - 4.5xy - 9y*y - 7.5

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