1. The absolute value of m plus 2 plus the square of N + 3 equals 0. What is the value of M and N? 2. (m-1) multiply x to the power of m by Y is a binomial about X, y, and find M 3. The absolute value power of M + 1 of polynomial x multiplied by Y square + m multiplied by x square + 1 is a cubic trinomial about X 2、 two m (m-1)x y 3、 |m+1| 2 2 X y +mx +1 And the first question. Can't square be zero?

1. The absolute value of m plus 2 plus the square of N + 3 equals 0. What is the value of M and N? 2. (m-1) multiply x to the power of m by Y is a binomial about X, y, and find M 3. The absolute value power of M + 1 of polynomial x multiplied by Y square + m multiplied by x square + 1 is a cubic trinomial about X 2、 two m (m-1)x y 3、 |m+1| 2 2 X y +mx +1 And the first question. Can't square be zero?

1. If | m + 2 | + (n + 3) & # 178; = 0, then M = - 2, n = - 3
2. If (m-1) x ^ my ^ 2 is a quadratic monomial, then M = 1
3. Let | m + 1 | = 3, then M = 2 or - 4

In the triangle ABC, we know that B = 4cosa / 2, C = 4sina / 2
In the triangle ABC, we know that a = Pai / 3, a = 3, and prove that when ABC is an equilateral triangle, its perimeter gets the maximum

Triangle area = 1 / 2 * bcsina
=8*sinA/2*cosA/2
=4sinA
So the maximum area of the triangle is 4

In △ ABC, we know that B = 4cosa / 2, C = 4sina / 2, find the maximum value of △ ABC area and the minimum value of A
In △ ABC, B = 4 · cosa / 2, C = 4 · Sina / 2,
Finding the maximum value of △ ABC area and the minimum value of a
On the first floor, I'll know the formula
And we have calculated s = 4sin square a
So I wonder if the maximum value of S is 4
In addition, what is the minimum value of a
I calculated a = 16-36 sin acosa
And then it won't melt

There is a formula for calculating the area of a triangle. If you know the two sides and the angle, then there is s = 0.5 * b * csina, that is, s = 8cosa / 2 * Sina / 2 * Sina, Sina = 2cosa / 2 * Sina / 2, and the result is not calculated