If the root of the equation 3x + 2A = 0 of X is 2, then a is equal to 0______ ．

If the root of the equation 3x + 2A = 0 of X is 2, then a is equal to 0______ ．

Substituting x = 2 into 3x + 2A = 0, we can get: 3 × 2 + 2A = 0, and the solution is: a = - 3

On the equation of X - 4 + AX = 3x + B when --, the equation has a unique solution There are countless solutions The equation has no solution

ax-3x=b+4
(a-3)x=b+4
The equation has a unique solution
The coefficient of X is not equal to 0
So A-3 ≠ 0
a≠3
There are countless solutions
A-3 = 0 and B + 4 = 0
A = 3 and B = - 4
The equation has no solution
A-3 = 0 and B + 4 ≠ 0
So a = 3 and B ≠ - 4

If the height of a cylinder is shortened by 6cm, its surface area will be reduced by 75.36cm2 and its volume will be reduced______ Cubic centimeter

The radius of the bottom surface is: 75.36 △ 6 △ 3.14 △ 2 = 2 (CM), so the reduced volume is: 3.14 × 22 × 6 = 75.36 (cm3). A: the volume is reduced by 75.36 cm3. So the answer is: 75.36

This willow tree is about two embraces thick, thick leaves cover more than 100 square meters of shade?

The willows are thick and the leaves shade them

If the initial velocity VO of an object moving in a straight line with uniform velocity is 8m / s, and the velocity V1 after 5S is 2m / s, then the acceleration is_____ M / S ^ 2, the direction of velocity and the direction of object motion_____ And the direction of the speed change______ (insert "same" or "opposite")

Using VT = V0 + at
The same, the opposite
(speed and direction are always the same.)

Use three squares of the same size to make a rectangle. The perimeter of the rectangle is 60 cm less than the sum of the original three squares. What is the area of each square?

A: the area of each small square is 225 square centimeters

Simple calculation of 1.5 × 12 + 7.2x8 + 15 △ 1.25 + 7.8 △ 1 / 8
Big brothers and sisters, help to count

15×1.2+7.2x8+15÷1.25+7.8÷1/8=15 X 1.2+7.2 X 8+15 X 0.8+7.8 X 8=15 X (1.2+0.8)+(7.2+7.8) X8=150

Given that f (x) = a-12x-1 is an odd function defined on (- ∞, - 1] ∪ [1, + ∞), then the range of F (x) is___ ．

This is the odd function that is defined in the sense of {{ {{{[1, + ∞) and the odd function {f (- f (- x)) \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\(0,1] f (x) ∈ [- 32, - 12) ∪ (12,32] so the answer is: [- 32- 12)∪(12，32]

3. Nine small squares with the side length of 2 cm are used to form a combined figure with the largest perimeter, and the perimeter is (),

The nine squares are arranged in a row to form a rectangle with the largest perimeter. The length of the rectangle is 9 × 2 = 18 cm, the width is 2 cm, and the perimeter is (18 + 2) × 2 = 40 cm

1. (7 / 9-5 / 6 + 3 / 18) * 18-1.45 * 6 + 3.95 * 6 2. - 9, - 6,2,7, use four operations to make the result equal to 24
There are four kinds of questions in the second question

(7/9-5/6+3/18)*18-1.45*6+3.95*6
=14-15+3+6(-1.45+3.95)
=2+6*2.5
=17
-9*2-(-6)*7=24
(-9+7)*2*(-6)=24
[7-(-9)]-(-6)+2=24