2x2−2x−12=0
Use the quadratic formula to find the solutions.
−b±√b2−4(ac)2a
Substitute the values a=2
, b=−2, and c=−12 into the quadratic formula and solve for x
.
2±√(−2)2−4⋅(2⋅−12)2⋅2
Simplify.
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x=1±52
The final answer is the combination of both solutions.
x=3,−2
<u><em>Answer: y=27 and 27=y *The answer should be positive sign.*</em></u>
Step-by-step explanation:
multiplication property of equality is multiplying both sides of an equation by the same number does not change the equation.
a*c=b*c
division property of equality is dividing both sides of an equation by the same non-zero number does not change the equation.
a/c=b/c for c≠0
multiply by 3 both sides of an equation.
3*2/3y=18*3
simplify.
18*3=54
2y=54
divide by 2 both sides of an equation.
2y/2=54/2
simplify by equation.
54/2=27
27*2=54
54/27=2
2*27=54
y=27
Hope this helps!
Thanks!
Have a great day!
Answer:
They need to wash 72 cars
Step-by-step explanation:
2000 - 1640 = 360
360/5 = 72