4.3,4.4,4.5,4.7,4.8

Question 1

Rationalizing denominator, what do you multiply if it’s a + or - sqaure root of B

Answer 1

Do opposite, so if a - then multiply by a +

Question 2

Solving quadratic equations by extracting the root 2x^2-15=65

Answer 2

2x^2-15=65
\+15
2x^2=80
Divide by 2
Square root both
Fund both pos and neg

Question 3

Find discriminate

Answer 3

B^2-4ac

Question 4

Making a perfect square

Answer 4

(B/2)^2 =c
Binomial perfect square
(X+ b/2)^2

Question 5

Write a quadratic in vertex form

Answer 5

Complete the square and then put it all together
Max a<1
Min a>1
Max and min are y value

Question 6

Difference of two squares factoring

Answer 6

(X+Y)(X-Y)= X^2-Y^2

Question 7

Solve by completing the square

Answer 7

Divide entire by a 
Move constant to other side 
(B/2)^2 gives you c and constant plus 
Then b/2 is (x+b/2)^2= constant plus
Then solve

Question 8

Discriminant>0
=0
<0

Answer 8

Two real solutions
One solution
No solution