Okie, so there are 2 ways to approach this problem. One way is to solve the problem via substitution. The other method which I'll use in this case is plug it in. So, let's go one by one.
2(0) - 2(-6) = 12 yup
2(4) - 2(-2) = 12 yup
2(-6) - 2(0) = 12 nope
2(-2) - 2(4) = 12 nope
So we canceled it down to 2 left. Now, plug the two possible answers into the second equation.
(-6) ^ 2 + (0) ^ 2 = 36 yup
(-2) ^ 2 + (4) ^ 2 = 36 nope
The answer that fits both equation is therefore the first one (-6,0)
I hope this helps :-)
1) In order to add or subtract fractions denominator must be equal
Lcm of denominator is 4×5=20 since they are co primes
Now the denominator becomes same
2)
Lcm =8
3)
We just need to add the fractions
Lcm=12
hope it helps :)
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Answer:88
Step-by-step explanation:
Here is the problem.....√(15x + 10) = 2x+3
to remove the square root, we do the opposite which is to square everything.
(√(15x + 10))² = (2x + 3)² (the square negates the square root)
15x + 10 = (2x +3)(2x + 3) (use the distributive property to continue)
15x + 10 = 4x² + 6x + 6x + 9 (combine like terms)
15x + 10 = 4x² + 12x + 9 (subtract 15x and 10 from each side)
-15x - 10 -15x - 10
0 = 4x² - 3x - 1 (factor completely)
(x - 1) (4x + 1) (set each to equal 0)
x - 1 = 0 4x + 1 = 0
x = 1 4x = -1
x = -1/4
place both into the equation to check for reasonableness...we see the negative number is not reasonable, but the x value of 1 is a solution.
answer is 1
Answer:
11-2 or 9
Step-by-step explanation:
