someone help plz!!

Question

-1

796

4

What non-zero integer must be placed in the square so that the simplified product of these two binomials is a binomial: $(6x+4)(15x-\Box )$ ?

Guest Mar 30, 2020

MathsAreFun · Answer 1 · 2020-03-30T04:23:28

Hey CPhill, could you look at a problem that is 15th from the top and says that the person has been stuck for an hour. Thank you!

MathsAreFun · Answer 2 · 2020-03-30T04:23:52

After you're done with this problem of course.

CPhill · Answer 3 · 2020-03-30T04:24:54

(6x + 4) * (15x - Square )

We need to have a "square" that will "cancel" the resulting "x" term

This can be done by making the 'square" = -10

Proof

(6x + 4) (15x - 10) =

90x^2 + 60 x - 60 x - 40 =

90x^2 - 40 = a binomial