When x is equal to what number, the value of 3x plus 4 is equal to that of 4x plus 6

When x is equal to what number, the value of 3x plus 4 is equal to that of 4x plus 6

3x+4=4x+6
4x-3x=4-6
x=-2
When x = - 2, the values of 3x + 4 and 4x + 6 are equal

-What is 4x + 8 = 3x-6?

x=2

X @ (1,2) inequality (x-1) ^ 2

When x @ (1,2), log (a) (x) > (x-1) ^ 2 > 0, so a > 1
From the graph of function, log (a) (2) > 2-1) ^ 2 = 1
So log (a) (2) > 1, 1

How many square kilometers is 800 hectares

800 ha = 8 km2

Factorization factor: X squared times (x minus y) plus (y minus x)

x^2*(x-y)+(y-x)
=x^2*(x-y)-(x-y)
=(x-y)(x+1)（x-1)

On the problem of derivative: find the cube passing through the curve y = x + the square of X; the tangent equation of the last point (- 1,0)
Find the tangent equation passing through a point (- 1,0) on the curve y = x & sup3; + X & sup2
There are two solutions to the problem. I can only work out one
I directly take x = - 1 into the curve equation, calculate △ Y / △ x = (△ x) &# - 2 △ x + 1, and then find out the derivative is 1, so the equation is y = x + 1
There is also a y = 0 in the answer. How did you get it

Hehe, this is a basic problem. Note that it is "Guo" (- 1,0), not at (- 1,0), that is (- 1,0) in this problem is not necessarily the tangent point. The answer you get is (- 1,0) is the tangent point. What if (- 1,0) is not the tangent point? The solution of this problem is as follows: let the tangent point be (a, a & # 179; + A & # 178;) derivation y '= 3

4.21 × (- 4 / 7) + 4 / 7 × (- 2.79) + 8 × 1 / 100 × 125

4.21×（-4/7）+4/7×（-2.79）+8×1/100×125
=-4/7X(4.21+2.79)+8X125X1/100
=-4/7X7+1000X1/100
=-4+10
=6

75% of a number is 60. 58% of a number is 60______ ．

60 △ 75% × 58, = 80 × 58, = 50; answer: 58 of this number is 50

3x squared x 6x-4 = 0 steps

Formula or formula

Can 1.25 × 0.737 1 / 8 × 3.63-12.5% be calculated simply
How to calculate

1.25×0.737 +1/8×3.63-12.5％
=1.25×0.737 +0.125×3.63-0.125
=0.125×7.37+ 0.125×3.63-0.125
=0.125×（7.37+3.63-1）
=0.125×10
=1.25