Question

Simplify 3√5 - 2√7 + √45 -√28.

2√12

2√2

6√5 - 4√7

6√10 - 4√14

Answer 1

what are prime factors of 45?

Answer 2

5 , 15, 3

Answer 3

15 is not prime

Answer 4

5?

Answer 5

ok i gt ya

Answer 6

45 = 3 * 3 * 5 right?

Answer 7

yes

Answer 8

you have one term that is √45

√45 = √(3 * 3 * 5)
= √(3^2 * 5)
= √3^2 * √5
= 3 * √5

Answer 9

because √x^2 = x
and √(x * y) = √x * √y

Answer 10

do you know the prime factorization of 28?

Answer 11

\[3\sqrt{5}-2\sqrt{7}+3\sqrt{5}+\sqrt{9}\sqrt{5}-2\sqrt{7}\]\[3\sqrt{5}+3\sqrt{5}-2\sqrt{7}-2\sqrt{7}\]\[6\sqrt{5}-4\sqrt{7}\]