Question

Multiply.

(5x+ 3)(5x − 3)
A. 25x² + 30x-9
B. 25x² - 9
C. 25x² 30x - 9
D. 25x² +9

Answer 1

Answer: B

25x² - 9

Explanation:

(5x+ 3)(5x − 3) = (5x)² - 3² = 25x² - 9

Answer 2

Hello!

Answer:

`\large \boxed{\sf 25x^(2) - 9}`

Explanation:

It's a remarkable identity:

`\sf (5x + 3)(5x - 3)`

`\sf (a + b)(a - b) = a^(2) -b^(2)`

◼ Replace a and b:

`\sf (5x)^(2) -3^(2)`

◼ Simplify the expression:

`\boxed{\sf 25x^(2) - 9}`