Factorise completely
x²-7x=12

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Step-by-step explanation:

x²-7x=12

we make the equation equal to zero by subtracting 12 from both sides, we have..

x²-7x-12 = 12-12

x²-7x-12= 0

we find the factors of 12 such that when we multiply them we will get -12 and when we add them we will get -7, and those factors are but those values are not possible..

so answer = undefined

answer is the third choice:

3x^5+4x^4+x^3+2x^2-10x-7=0

step-by-step explanation:

answer: you need to organize this better it does not make sense.

step-by-step explanation: ?