Question

find the product (9x+5x)(9x-5y)

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Answer 1

81x^2-25y^2

Step-by-step explanation:

(9x+5y) (9x-5y)= (9x)(9x) + (9x)(-5y) +(5y)(9x) + (5y)(-5y) = 81x^ - 45xy + 45xy -25y^2 = 81x^2 - 25 y^2

Answer 2

Answer:

81x^2-25y^2

Step-by-step explanation:

(a+b)(a-b)=(a^2-b^2)

a=9x

b=5y

a^2=81x^2

b^2=25y^2

so final solution is 81x^2-25y^2