X²+x-6=0hãy tìm giá trị của x trong câu trên

Mathematics

1 answer:

Gennadij [26K]2 years ago

6 0

Tìm giá trị của x :

${x}^{2} + x - 6 = 0$

$x {}^{2} + 3x - 2x - 6 = 0$

$x(x + 3) - 2(x + 3) = 0$

$(x + 3)(x - 2) = 0$

Bây giờ, có hai trường hợp :

Trường hợp 1. khi nào x + 3 = 0

x = -3

Trường hợp 2. khi nào x - 2 = 0

x = 2

Tôi hy vọng nó đã giúp !

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A rectangle has an area of 45x2 − 42x − 48 and a width of 5x − 8. what is the length of the rectangle? to find the length of the

kondaur [170]

If the area and width of the rectangle are 45x² − 42x − 48 and (5x − 8) then the length of the rectangle will be (3x + 2).

<h3>What is a rectangle?</h3>

It is a polygon that has four sides. The sum of the internal angle is 360 degrees. In a rectangle, opposite sides are parallel and equal and each angle is 90 degrees. And its diagonals are also equal and intersect at the mid-point.

A rectangle has an area of 45x² − 42x − 48 and a width of 5x − 8.

Then the length of the rectangle will be

area = length × width

Then we have

Area = 45x² − 42x − 48

Then the factor of the polynomial will be

Area = (5x − 8)(3x + 2)

Then the length of the rectangle will be (3x + 2).

More about the rectangle link is given below.

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2 years ago