5.3 Solving Quadratic Equations by Finding Square Roots. (p. 264). How would you solve the equation: x 2 = 4 (take the square root of each side!). * Remember, the square root of a positive # has 2 answers! (one + and one -). Radical. Radical sign. Radicand. Properties of Square Roots.
* Remember, the square root of a positive # has 2 answers! (one + and one -)
(a>0 and b>0)
You CANNOT leave a radical in the denominator of a fraction!
No tents in the basement!!!!
(the numerator is OK)
Just multiply the top & bottom of the fraction by the radical to “rationalize” the denominator.
Can’t have a tent in the basement!
-5x2 = -12
(x-2)2 = 7
x2 = 12
Height of the object after it has fallen
Object’s initial height
# of seconds after the object is dropped