# mmh

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wats xsquared-13x+36=0

• Math -

Please type your subject in the School Subject box. Any other words, including obscure abbreviations, are likely to delay responses from a teacher who knows that subject well.

• mmh -

sqroot(0)=0

you must find where is:

-13x+36=0

-13x=-36 Divide with -13

x=(-36)/(-13)

x=36/13

• mmh - the correct answer and spelling of "math." -

I have no idea what Anonymous did. That answer makes no sense.

x^2-13x+36 is the same as:
(x-4)(x-9)

Any number multiplied by 0 is 0. For example:
100 x 0 = 0
8 x 0 = 0
63655215777999400525 x 0 = 0

So if x-4 equals 0 OR x-9 equals zero, then we know that x-4 times x-9 equals zero.

x-4 = 0. In that case, x=4. (4-4 is zero)
x-9 = 0. So in that case, x=9. (9-9 = 0)

So x is either 4 or 9. Let's check to be sure.

4:
x squared is 16
13x is 52
36 is...well...36.

16 -52 + 36 does equal 0. So we are ok there.

9:
9 squared is 81
13 x 9 = 117

81 - 117 + 36 equals zero.

Side note: if writeteacher didn't correct your spelling of "math," I likely would not have seen this question. Be careful next time.

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