Simplify the product.
5b(6b-10)
a.11b-10
b.5b^2+6b-10
c.-b - 10
d.60b^2-50b

Your answer is D for your purposes

Work:
Multiply b and 5
Multiply b and 1
The b just gets copied along.

5*b evaluates to 5b

Multiply b and 6
Multiply b and 1

6*b evaluates to 6b
6*b-10 evaluates to 6b-10
Multiply 5b by 6b-10
Multiply 5b by each term in 6b-10 term by term.

This is the distributive property of multiplication.

Multiply 5b and 6b
Multiply the b and b
Multiply b and b

Combine the b and b by adding the exponents, and keeping the b, to get b²

5b × 6b =

Multiply 5b and -10
Multiply b and 1

5b × -10 = -50b

5*b*(6*b-10)

***The final answer is 30b²-50b***

Hold on lemme do the work