Question

Find each of the following products:
15. (x"-3x + 7) (2x + 3)
17. (x2 - xy + y) (x + y)
19. (x-2x²+5)*(4x - 1)
21. (x²-5x+8)(x²+2)
23. (3x +2y - 4)*(x - y +2)
25. (2x² + 3x - 7) (3x2 -5x + 4)​

Answer 1

$15. (x-3x + 7) (2x + 3) \\ = 2 {x}^{2} + 3x - 6 {x}^{2} - 9x + 14x + 21 \\ = - 4 {x}^{2} + 8x + 21 { \red{ \ answer}}$

${\huge\mathcal{\fcolorbox{lime}{black}{\pink{FROM☞ ADESH \: KUMAR}}}}$

Answer 2

Answer:

(x+y)(x

2

−xy+y

2

)

=x(x

2

−xy+y

2

)+y(x

2

−xy+y

2

)

=x

3

−x

2

y+xy

2

+x

2

y

−

xy

2

+y

3

=x

3

+y