Question

Expand (2a + 3b - c)² and write the coefficient of ac.​

Answer 1

Answer:

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${\underline{\boxed{\sf{\pink{\mathtt{Given:-}}}}}}$

$(2a + 3b - c)²$

$\small\underline\mathcal\red{Required \: Solution:-}$

$(2a+3b−c)² \\  {by \: using (a+b+c)² \: identities}  \\ 4a² +9b² +c² +12ab−6bc−4ac$

Answer 2

Answer:

-4 is the coefficient of ac