Question

100 points !

Answer 1

Answer:

Step-by-step explanation:

$(-5y^2-9y-4)-(-2y^2-y+8)$

To find the opposite of $-2y^2-y+8$, find the opposite of each term.

$-5y^2-9y-4+2y2+y-8$

Combine $-5y^2$ and $2y^2$ to get $-3y^2$.

$-3y^2-9y-4+y-8$

Combine -9y and y to get -8y.

$-3y^2-8y-4-8$

Subtract 8 from -4 to get -12.

$-3y^2-8y-12$

$(3x-2)(5x^2-7x+2)$

Use the distributive property to multiply $3x-2$ by $5x^2-7x+2$ and combine like terms.

$15x^3-31x^2+20x-4$

$(x-1)(3x-2)(5x-2)$

Hope this helps! Brainliest would be much appreciated! Have a great day! :)

Answer 2

Answer:

• Given Below.

Step-by-step explanation:

(a)

$\left(-5y^2-9y-4\right)-\left(-2y^2-y+8\right)$

$\left-5y^2-9y-4\right+\left2y^2+y-8\right)$

$-3y^2 -8y -12$

(b)

$\left(3x-2\right)\left(5x^2-7x+2\right)$

$15x^3-21x^2 +6x - 10x^2 +12x - 4$

$15x^3-31x^2+20x-4$