Question

*
Q28. Simplify:
(4x + 5y)2 + (5x + 4y)2
​

Answer 1

Answer:

Correct option is

A

True

Multiplying(4x−5y)(5x−4y),

=20x

2

−25xy−16xy+20y

2

=20x

2

−41xy+20y

2

\\

Answer 2

Step-by-step explanation:

(x² - 3x + 2) (5x - 2) - (3x² + 4x - 5) (2x - 1)

(5x³ - 2x² - 15x² + 6x + 10x - 4) - (6x³ - 3x² + 8x² - 4x - 10x + 5)

5x³ - 17x² + 16x - 4 - 6x³ - 5x² + 14x - 5

-x³ - 22x² + 30x - 9