Question

simplify (8a+5b)²-(8a-5b)²
simplify (2x+3)(5x-4)+(4x-2)(3x+2)

Answer 1

Answer:

1. 160ab

1. 160ab2.22x^2+9x-16

Step-by-step explanation:

1. (8a+5b)^2-(8a-5b)^2

• it is given in the form x^2-y^2
• where x=8a+5b and y=8a-5b

So

• x^2-y^2=(x-y)(x+y)

=(8a+5b-8a+5b)(8a+5b+8a-5b)

=(10b)(16a)

=160ab

Answer: 160ab

2. (2x+3)(5x-4)+(4x-2)(3x+2)

• Simply

=(10x^2-8x+15x-12)+(12x^2+8x-6x-4)

=10x^2+7x-12+12x^2+2x-4

• add like terms

Answer: 22x^2+9x-16

Please mark my answer as brainliest