1) The sum of a number and its square is 56. What is the number?
2) The width of a rectangle is 5 mm shorter than its length. If the area is 300 mm?, what are the
dimensions of the rectangle?

plz halp

there are many solutions.

step-by-step explanation:

step 1: simplify both sides of the equation.

4x+6=4x^2+10x−4

step 2: subtract 4x^2+10x-4 from both sides.

4x+6−(4x^2+10x−4)=4x^2+10x−4−(4x^2+10x−4)

−4x^2−6x+10=0

step 3: factor left side of equation.

−2(2x+5)(x−1)=0

step 4: set factors equal to 0.

x=-5/2 or x=1

answer: your correct answer is b. d.

step-by-step explanation: