Question

step by explain don't give an direct answer step need I know the answer pls give the step by explain ​

Answer 1

Answer:

Step-by-step explanation:

3x^2 + [-7x^2] + 5x^2

= 3x^2 -7x^2+5x^2                    [+*-= - therefore -7]

=8x^2-7x^2                                [ added both the positive terms]

=x^2