Question

What is the product of 9a + 4 and 6a -5

Answer 1

ANSWERRR IS IN THE PICTURES

Answer 2

So we have (9a + 5) x (6a - 5)
So we can expand one bracket to get:

= {9a x (6a - 5)} + {5 x (6a - 5)}
= {54a^2 - 45a} + {30a - 25}

Now its simple, we open all the brackets and do simple addition of like terms:
= 54a^2 - 45a + 30a - 25
= 54a^2 - 15a - 25

And that’s the final answer.