2.simplify the expression below. 3x2 – 5x2 +4x2

let's simplify-

3x2−5x2+4x2

=3x2+−5x2+4x2

combine the like terms-

=3x2+−5x2+4x2

=(3x2+−5x2+4x2)

=2x2

here you hope this .

step-by-step explanation:

hypotenuse = √(15² + 8²)

=  √(225 +64)

=  √(289) = 17

sin(x) = cos(y) = 8/17

they are identical so long as you are doing the sine of one angle and the cosine of the only other angle that isn't the right angle.