Question

Which of the following mathematical statements is/are wrong?

• A.
• B.
• C.
• D. All are correct

Answer 1

The correct option is C

$(x-2)(x-5)=x^2-7x+10$ is correct.

$(x+2)(x-2)=x^2-4$ is correct.

$(3x+2{)}^2=3x^2+12x+4$ is wrong. The right expression is $9x^2+12x+4$.