Answer:
Step-by-step explanation:
÷
= 
= 
= 1
Use KCF method,
Keep the first number.
Change the division to multiplication
Flip the second number
Result:
5
/5 : 1
/2 = 5
/5 · 2
/1 = 5 · 2
/5 · 1 = 10
/5 = 2
To divide one fraction by another, invert (turn upside-down) the second fraction, then multiply.
12a^2 / 6b. This one is multiplied by 3/3 which equals one which keeps it the same.
Answer:
7x^2+15x+31
Step-by-step explanation:
(3x+5)(x+5)
FOIL
3x^2+15x+5x+25
(3x^2+20x+25)+(4x^2-5x+6) = 7x^2+15x+31