If the value of 2 (x + 3) and 3 (1-x) are opposite, then x is equal to () A. 9B. 8C. -9D. -8

If the value of 2 (x + 3) and 3 (1-x) are opposite, then x is equal to () A. 9B. 8C. -9D. -8

According to the meaning of the question: 2 (x + 3) + 3 (1-x) = 0, the solution is x = 9. Then x equals 9

Given that x ∧ 2 + X-1 = 0, find the value of 2012x ∧ 3 + 4024x ∧ 2. I read the answer, which is 2012. Why?

If x ^ 2 + X-1 = 0, then x ^ 2 + x = 1
2012x^3+4024x^2
=2012x(x^2+x)+2012x^2
=2012x+2012x^2
=2012(x^2+x)
=2012

It is known that one side of a triangle is a meter long, and the height on this side is 1 meter less than that on this side, then the area of this triangle is_____ Square meter (expressed by algebra containing a)

1 / 2A (A-1) m and 178;

Given that the line y = AX-2 and the line y = BX + 1 intersect at the same point on the x-axis, what is a / b

Intersection at the same point of X axis means y = 0, X is equal, then y = AX-2 is x = 2 / A
Similarly, x = - 1 / B, X is equal, so - 1 / b = 2 / A, so a / b = - 2