Question

are these two expressions equal? (q-r)^2 and q^2-r^2?????

Answer 1

Answer:

$\boxed{\sf No}$

Step-by-step explanation:

$(q-r)^2$

Expand brackets.

$(q-r)(q-r)$

$q^2 -rq -rq+r^2$

Combine like terms.

$q^2 -2rq+r^2$

The expression is not equal to $q^2 -r^2$.

Answer 2

Answer:

Yes, they are.

Step-by-step explanation:

$(q - r) {}^{2} =( q) {}^{2} - (r) {}^{2} = q {}^{2} - r {}^{2}$

$(q - r) {}^{2} = q {}^{2} - r {}^{2}$

Hope this helps ;) ❤❤❤