The perimeter of a rectangle is 4A + 4B. If one side of the rectangle is represented by a, what is the area of the rectangle?

The perimeter of a rectangle is 4A + 4B. If one side of the rectangle is represented by a, what is the area of the rectangle?

Is the power of a number positive or negative

The even power of a negative number is positive, the odd power is negative, and any power of a positive number is positive

If the area of a rectangle is a ^ 2 + 7ab-18b ^ 2 and one of its sides is a-2b, then the perimeter of the rectangle is?

How to judge whether the answer to an integer is negative or positive? For example, what is the answer to the third power of (- a) × (the fifth power of (- a) × (the sixth power of (- a)
Positive or negative

The third power of (- a) × (the fifth power of - a) × (the sixth power of (- a)
=-A third power × (- a fifth power) × a sixth power
=A octave power × a sixth power
=The 14th power of a
Positive number

If the area of a triangle is the third power of 4A and the fourth power of B, and the length of its bottom is the square of 2Ab, then the height is?

S=1/2*a*h
So h = 2S / a = 2 * 4a to the third power, B to the fourth power / 2Ab to the square
Because I don't know whether the square of 2Ab is the square of AB or the square of B, but that's the way to end. Just calculate it yourself

(3 / 8) ^ 1 / 2 × (3 / 2) ^ - 1 / 2 (the result is expressed as a power)

(3/8)^1/2 ×(3/2)^-1/2
=3^1/2*(2^3)^(-1/2)*3^(-1/2)*2^1/2
=3^(1/2-1/2)*2^(-3/2+1/2)
=1*2^(-1)
=2^(-1)

If the base of a triangle is 4a2 + 12 and the height is 16a4-2a2 + 14, the area of the triangle is___ ．

The area of the triangle is: 12 × (4a2 + 12) (16a4-2a2 + 14) = 12 (64a6-8a4 + A2 + 8a4-a2 + 18) = 32a6 + 116, so the area of the triangle is: 32a6 + 116

If the absolute value of a positive number is less than that of another negative number, then the sum of two numbers must be ()
A. Positive number B. negative number C. zero D. sign of indeterminate sum

∵ the absolute value of a positive number is less than that of another negative number, and the sum of two numbers must be negative

The length of the base of a triangle is (2a + 6b), the height is (a-5b), and the area of the triangle is (2a + 6b)_____ .

The area formula of triangle is s = 1 / 2 * bottom * height
So s = 1 / 2 * (2a + 6b) (a-5b)
=a^2-2ab-15b^2

Why to add absolute value sign when expressing the module of vector
Such as the title
I mean, can't you say their modules without absolute symbols

The vector is put into the coordinate, and the absolute value sign indicates the distance from the end point of the vector to the origin, which is similar to that on the number axis. The meaning of the absolute value sign is the distance from the point to the origin, so the absolute value sign represents the module of the vector
Without absolute sign, it means not only the size but also the direction