ZEAHWOLFY124viz
Answered

What is the numerical coefficient of xy in the expansion of (3x + 5y)²?

A.45
B.-45
C.30
D.-30

Sagot :

Klooweiiiviz

Answer:

C. 30

Step-by-step explanation:

EXPAND FIRST.

9x²+30xy+25y²

Answer:

C. 30

Step-by-step explanation:

Simplify:

(3x + 5y)²

=9x²+30xy+25y²