Simplify the expression.

2x2+23

Step-by-step explanation:

=7x2+3+(−5)(x2)+(−5)(−4)

=7x2+3+−5x2+20

Combine Like Terms:

=7x2+3+−5x2+20

=(7x2+−5x2)+(3+20)

=2x2+23

Hope this helps!

1/2*qr*rs

step-by-step explanation:

for this case we must apply distributive property to the following expression:

the distributive property states that:

then, when applying the property we have to multiply the -2 for each term within the parenthesis: