Can you help me with this...thank you​

Find the quotient. 50a2 – 98b2 -5a +7b

What is always true about a positive integer raised to a negative odd power?

Which sum or difference identity would you use to verify that cos (180° - q) = -cos q? a.) sin (a -b) = sin a cos b – cos a sin b b.) cos (a -b) = cos a cos b – sin a sin b c.) cos (a -b) = cos a cosb + sin a sin b d.) sin (a + b) = sin a cos b + cos a sin b