#im in a math quiz session rn, i need help asap
south storm
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loud sorrel
Plug in the roots in A and B and see for which function 0 comes out for both roots and where not.
south storm
Plug in the roots in A and B and see for which function 0 comes out for both roo...
can u show me an example
on how to do it
i just get the square root of both 9 and -12, and subtract them, and see if it's 0?
proper dagger
roots are nothing but numbers when plugged into the equation, it gives 0 as answer
loud sorrel
on how to do it
say we have x = 2
A. x² -4x + 4
B. x² + 4x + 4
For which of the both is 2 a root?
You try out by plugging in the value and see if 0 comes out
south storm
So is it A or B?
b
proper dagger
- 2x^2 + 6x -225
2(-12)^2 + 6(-12) - 225 (plugging x=-12)
2*144 + -72 - 225 = which is clearly not equal to 0
south storm
You try out by plugging in the value and see if 0 comes out
OHHHHH
IF I SUBTRACT -4 AND 4
IT TURNS OUT TO BE 0
so its a?
loud sorrel
1) 2x^2 + 6x -225
2(-12)^2 + 6(-12) - 225 (plugging x=-12)
2*144 + -72 - 225 = ...
It's nice that you can solve this but it's better to teach him than provide the solution directly
proper dagger
- 2x^2 + 6x - 216
2(-12)^2 + 6(-12) - 216 = 288-72-216 = 0 (plugging in -12)
2(9)^2 + 6(9) - 216 = 162+54-216 = 0 (plugging 9)
answer is B
loud sorrel
ohh thanks
Did you understand the approach?
south storm
Did you understand the approach?
yea, i just try to plug in the value
and see if its a 0
loud sorrel
Perfect
south storm
ty
loud sorrel
If there is nothing more you may close the case with .solved
south storm
.solved