10x^2-14xy-15x+21y i got (2a-3)(5x+? y)

Hey there!!

We have:

... 10x² - 14xy - 15x + 21y

Now, let's group these terms.

... 10x² - 15x - 14xy + 21y

Now, we have grouped these terms. We have two sections.

10x²-15x and -14xy+21y

Now, let's take common term in both these sections.

... 10x²-15x (The common term is 5x )

Hence, this would become:

... 5x(2x-3)

And -14xy + 21y

(The common term,is 7y )

... 7y(-2x+3)

Hence, the equation would be :

... 5x(2x-3)+7y(-2x+3)

... (5x+7y)(2x-3)

Hence, a = x and ?=7

Hope my answer helps!

d) -1

step-by-step explanation:

ion

step-by-step explanation:

ion ion ion ion ion ion ion ion ion ion ion