SOLUTION: Check each of the given numbers to see if they are solutions to each equation. Show your checks and summarize which are solutions and which are not: m−2m2 =−120

Algebra ->  Expressions-with-variables -> SOLUTION: Check each of the given numbers to see if they are solutions to each equation. Show your checks and summarize which are solutions and which are not: m−2m2 =−120       Log On


   

Question 1179752: Check each of the given numbers to see if they are solutions to each equation. Show your checks and summarize which are solutions and which are not:

m−2m2 =−120


m=10,8,1,− −2, 7.5

Found 2 solutions by MathLover1, josgarithmetic:
Answer by MathLover1(20850) About Me  (Show Source):
You can put this solution on YOUR website!

m-2m%5E2+=-120
m=10,8,1,-2,+7.5

check m=10
10-2%2A10%5E2+=-120
10-200=-120
-190%3C%3E-120->m=10is not solution


check m=8
8-2%2A8%5E2+=-120
8-128=-120
highlight%28-120=-120%29->highlight%28m=8%29 highlight%28is%29 solution

check m=1
1-2%2A1%5E2+=-120
1-2+=-120
-1%3C%3E-120->m=1is not solution


check m=-2
-2-2%2A%28-2%29%5E2+=-120
-2-8+=-120
-10%3C%3E-120->m=-2is not solution


check m=7.5
7.5-2%2A%287.5%29%5E2+=-120
7.5-8+=-120
-0.5%3C%3E-120->m=7.5is not solution


Answer by josgarithmetic(39623) About Me  (Show Source):
You can put this solution on YOUR website!
Simply substitute each one, and find if the one makes the equation true or false. m-2m%5E2=-120