Required polynomial = x(x + 2)^3 = x(x^3 + 6x^2 + 12x + 8) = x^4 + 6x^3 + 12x^2 + 8x
Answer:
a = -2
b = 4
c = -3
Step-by-step explanation:
a quadratic equation is in the format <em>ax² + bx + c </em>
looking at our equation -2x² + 4x - 3 = 0, we look at the quadratic equation format as an example and see that
a = -2
b = 4
c = -3
Answer:
-3+radical(41)/8 , -3-radical(41)/8
Answer:
9 mph
Step-by-step explanation:
Let Kathryn can go x mph and Stephanie can go (x + 5) mph.
Therefore, Kathryn can go 25.2 miles in hours.
And Stephanie can go 25.2 miles in hours.
Given that
⇒
⇒ 126 = x² + 5x
⇒ x² + 5x - 126 = 0
⇒ (x + 14)(x - 9) = 0
⇒ x = -14 or x = 9
But x can not be negative, so x = 9 mph
Therefore, Kathryn can ride her bike at 9 mph. (Answer)