MATH SOLVE

3 months ago

Q:
# Please help the answer are 124XX+4-1616X+12X^2

Accepted Solution

A:

Step 1:

x² + 4x = 192

Step 2:

Take x common:

x ( x + 4) = 192

Length is x and width is x+4

Step 3:

x² + 4x - 192 = 0

Step 4:

x² + 16x - 12x - 192 = 0

x(x+16) - 12(x+16) = 0

(x-12)(x+16) = 0

⇒ x=12, x=-16

Because the length can't be -16, the length is 12.

x² + 4x = 192

Step 2:

Take x common:

x ( x + 4) = 192

Length is x and width is x+4

Step 3:

x² + 4x - 192 = 0

Step 4:

x² + 16x - 12x - 192 = 0

x(x+16) - 12(x+16) = 0

(x-12)(x+16) = 0

⇒ x=12, x=-16

Because the length can't be -16, the length is 12.