4x²+4x-35=0
factor: (2x+7)(2x-5)=0
2x+7=0, or 2x-5=0
2x=-7 or 2x=5
x=-3.5 or x=2.5
I don't see any rounding necessary in this case.
when you factor ax²+bx+c, you take the two factors of a and the two factors of c, one factor of a times one factor of c, the other factor of a times the other factors, the sum of the two products make b.
in this case, the factors of 4 is 2 and 2, the factors of -35 is -5 and 7. I line them up in the following way:
2 -5
2 7
then I multiple them diagonally, the top left 2 multiplying the bottom right 7=14, and the other 2 multiplying -5=-10, 14 and -10 make a sum of 4.
if you don't get the desired sum, switch the factors up and down till you have the right combination. Note: Do not switch left and right.
I hope this makes sense to you.
Answer:
5p + 2(p-2)
simplified to: 7p-4
Step-by-step explanation:
Q. states that shop opens for p hours on weekdays
this means that to find the total number of hours on weekdays it would be 5 times p, thus 5p
On weekends, "shop opens 2 hours less" , which means 2 hours less than p.
Thus hours for both saturday and sunday
2(p-2)
Total would be adding those two together
5p + 2(p-2)
expand 2(p-2) = 2p-4
thus, 7p-4
Answer:
y=3
y=1
y=0
Step-by-step explanation:
113.04 is the volume
V = pi x r^2 x h
3.14 x 2^2 x 9 = 113.04