Pls help I can't figure out how to factor this polynomial

If you replace y = 2x + 1, it's much clearer what the common factor among the terms in the sum are.

3xy + 10y = (3x + 10) y

so the factorization would be

3x (2x + 1) + 10 (2x + 1) = (3x + 10) (2x + 1)

answer: (-8,4) are the coordinates of a

step-by-step explanation:

let the side of square abcd is x .

thus the area of square abcd is .

now, by the diagram area of triangle ead= 1/2 × ea × ad = 1/2 × ea × x

( because ad is the side of square)

and, according to the question,

the areas of square abcd and right ead are equal.

⇒

⇒ea=2x

thus, ea: ab=2: 1

therefore, point a divides line segment eb into the ratio 2: 1.

⇒ by sectional formula coordinates of a are,

=

=

=(-8, 4)

thus the coordinates of a are (-8,4)