Will mark brainliest, i'm having some trouble (question in attachment)

45b^4/32

Step-by-step explanation: First multiply the two fractions

15b^3y(3b)/8y x 4

Multiply 3 by 15

45b^3yb/8y x 4

Raise b to power of 1

45(b^1b^3)y/8y x 4

Use power rule to combine exponents

45b^1+3 y/8y x 4

Simplify

45b^4y/32y

Cancel common factor of y

45b^4/32

Lina's solution is correct because it expresses 126 as a product of prime factors.

Step-by-step explanation:

Prime factorization can be defined as a methodology of breaking down an original number down into the set of prime numbers which when multiplied together give us the original number.

Prime factorization makes use of a factor tree

The number we are to carry out prime factorization on is 126

126

/\

3 42

/\

6 7

/\

2 3

The Prime Factorization is:

2 x 3 x 3 x 7

Hence, Lina's factor tree of 126. 126 branches to 3 and 42. 42 branches to 6 and 7. 6 branches to 2 and 3. The equation is 126

= 2 times 3 squared times 7.

Is correct.