Answer: -30b^2+76b+80
Explanation:
Multiply the second parenthesis by each term from the first parenthesis:
3b•2(-2•2+b+10)+4b•(-2b•2+b+10)+8(-2b•2+b+10)
Then distribute 3b•2 through the parenthesis
-24b^2+6b^2+60b+4b•(-2b•2+b+10)+8(-2b•2+b+10)
Then collect like terms
-30b^2+60b+40b-32b+8b+80
Collect like terms=
-30b+76b+80

4 0

3 years ago

What does x mean in a math equation

monitta

An unknown variable ..............

4 0

3 years ago

Read 2 more answers

Factor 5z2 + 19z - 4.

Alexxandr [17]

Answer:

$\huge\boxed{5z^2+19z-4=(z+4)(5z-1)}$

Step-by-step explanation:

$5z^2+19z-4=5z^2+20z-z-4\\\\\qquad\text{use the distributive property}:a(b+c)=ab+ac\\\\=5z(z+4)-1(z+4)\\\\\qquad\text{use the distributive property}:a(b+c)=ab+ac\\\\=5z\underbrace{(z+4)}_{a}-1\underbrace{(z+4)}_{a}=(z+4)(5z-1)$

7 0

4 years ago