Question

the value of (3x+5)²-(3x-5)²​

Answer 1

Step-by-step explanation:

Given,

(3x+5)²-(3x-5)²

let,

considered (3x+5) = a

and (3x-5) = b

so

according to above given = a^2-b^2

we know that a^2-b^2 = (a+b)(a-b)

so

(3x+5)²-(3x-5)² = (3x+5+3x-5)(3x+5-3x+5)

= (6x)(10)

= 60x