Question

Expand the expression (5x + 3)2, and write the result in standard form.O A.25x² + 30x+9OB.25x² +24OC.25x² +9O D.25x² + 15x+9

Answer 1

Remember that

$(a+b)^2=a^2+2ab+b^2$

In this problem we have

$(5x+3)^2=(5x)^2+2(5x)(3)+3^2=25x^2+30x+9$

The answer is the option A