It is known that the equation of point oblique line of a straight line is Y-2 = X-1, then the slope of the straight line is -- and the inclination angle is——

It is known that the equation of point oblique line of a straight line is Y-2 = X-1, then the slope of the straight line is -- and the inclination angle is——

The coefficient 1 before the slope is x, and the inclination angle is 45 degrees

Ear, is, left, your, this,

This is your left ear
Is this your left ear?

If the parabola y = ax ^ 2 + BX + C is known, then its analytical formula about Y-axis symmetric parabola is?
If the parabola y = ax ^ 2 + BX + C is known, then its analytical formula about Y-axis symmetric parabola is_____ ?

I think so
y=ax^2-bx+c

Given a & # 178; + B & # 178; - A + 4B + 4 × 1 / 4, find the value of a and B

That is, (A & # 178; - A + 1 / 4) + (B & # 178; + 4B + 4) = 0
(a-1/2)²+(b+2)²=0
So A-1 / 2 = B + 2 = 0
So a = 1 / 2, B = - 2

Convert the following parametric equations into ordinary equations and explain what curves they represent
X = 3-2t, y = - 1-4t, t is the parameter,
X = t + 1 / T, y = T-1 / T, t is the parameter

X = 3-2t, y = - 1-4t, t is the parameter,
x=3-2t → 2t=3-x,→4t=6-2x
Substituting y = - 1-4t: y = - 1-4 (6-2x) →
Y = - 25 + 8x → y = 8x-25 is a straight line
X = t + 1 / T, y = T-1 / T, t is the parameter
x^2=t^2+(1/t^2)+2
y^2=t^2+(1/t^2)-2
X ^ 2-y ^ 2 = 4 is an equiaxed hyperbola

The method of division and addition in factorization in mathematics

Factorization is the inverse operation of polynomial multiplication. In the operation of polynomial multiplication, several similar terms are often combined into one term or two similar terms with opposite signs are cancelled out to zero. When factoring some polynomials, it is necessary to recover those terms which are combined or cancelled out, that is to say, one of the polynomials is used to decompose some polynomials

In the same plane, take three points not on the same line as vertices to make parallelogram. How many can you make at most? Please draw a picture?

It can be made into three parallelograms
 
The middle points of the three sides of a large triangle are known as three points a, B and C
Three colors represent three parallelograms

3x - 2x + 1 ≥

The solution of 3x - 2x + 1 = 0 is x = - 1 / 3 or x = 1, so x ≥ 1 or X is less than or equal to - 1 / 3

Given that the vertex of the parabola y = x2-2x + C is on the X axis, do you think the value of C should be ()
A. -1B. 0C. 1D. 2

According to the meaning (− 2) 2 − 4C4 × 1 = 0, so C = 1

The number of positive integer solutions of equation 4x + 7Y = 102 is
Process!

4X+7Y=102
4X+4Y+3Y=102
4(X+Y)+3Y=102
X + y is a multiple of 3. Y is even, but not a multiple of 4
When y = 2, x = 22
When y = 6, x = 15
When y = 10, x = 8
When y = 14, x = 1
There are four groups