Question

Simplify: (7x - 9y2)(2x2 - 3y)(-5x + 2y) (9x - 10y) - 2x(3x + 5y) please give clear step-by-step explanation​

Answer 1

Answer:

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Step-by-step explanation:

Factoring:  14x3-18x2y2-51x2+xy+27y3+20y2  

Thoughtfully split the expression at hand into groups, each group having two terms :

Group 1:  14x3-51x2  

Group 2:  -18x2y2+27y3  

Group 3:  xy+20y2  

Pull out from each group separately :

Group 1:   (14x-51) • (x2)

Group 2:   (2x2-3y) • (-9y2)

Group 3:   (x+20y) • (y)

Looking for common sub-expressions :

Group 1:   (14x-51) • (x2)

Group 3:   (x+20y) • (y)

Group 2:   (2x2-3y) • (-9y2)

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