Aquadratic equation is written in four equivalent forms below.
i. y = x(x + 6) - 8(x + 6)
ii. y = (x - 1)2 - 49
iii. y = x2 - 2x - 48
iv. y = (x + 6)(x - 8)
which of the forms shown above would be the most useful if attempting to find the y-intercept of the quadratic equation?

Describe a way that someone could estime the length of a book

Simonne used the following steps to simplify the given expression. 12 - 3(-2x + 4) step 1: 12 + (–3)·(–2x) + (–3)·(4) step 2: 12 + 6x + (–12) step 3: 12 + (–12) + 6x step 4: 0 + 6x step 5: 6x what property of real numbers was used to transition from step 3 to step 4? a. identity property of addition b. inverse property of addition c. associative property of addition d. commutative property of addition

Me because some of question i don’t understand