What's the answer to 1/4 a + 5/4 a - 1/2 a = 100

4a/4=100

Step-by-step explanation:

1.Combine multiplied terms into a single fraction  

2.Multiply by 1  

3.Combine multiplied terms into a single fraction  

4.Combine multiplied terms into a single fraction  

5.Find common denominator  

6.Combine fractions with common denominator  

7.Multiply the numbers  

8.Combine like terms    

9.Cancel terms that are in both the numerator and denominator

x = ±sqrt(10)

step-by-step explanation:

5 - 2x² = -15

subtract 5 from each side

5-5 - 2x² = -15-5

-2x^2   = -20

divide by -2 on each side

-2x^2   /-2= -20/-2

x^2 =10

take the square root on each side

sqrt(x^2 )=±sqrt(10)

x = ±sqrt(10)

check:

5 - 2x² = -15

+sqrt(10)

5 - 2(sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15

-sqrt(10)

5 - 2(-sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15