Answer:
x = - 4 , x = - 3
Step-by-step explanation:
- 7x = x^2 + 12
Take all terms to one side of equation.
x^2 + 7x + 12 = 0
Find which 2 numbers multiply to give 12 and add to give 7.
a × b = 12
a + b = 7
a = 4
b = 3
Split the middle term using these 2 numbers.
x^2 + 4x + 3x + 12 = 0
Factorise each pair of terms separately.
x ( x + 4 ) + 3 ( x + 4 ) = 0
Bring out common factor of ( x + 4 ) and factorise.
( x + 4 ) ( x + 3 ) = 0
Using the Null factor law, make the expressions in each pair of parentheses equal 0.
x + 4 = 0
x = - 4
AND
x + 3 = 0
x = - 3
THEREFORE:
x = - 4 , x = - 3
Answer:
x = 3
Step-by-step explanation:
First you want to divide both sides by 5 to get 2x-4 = 2.
Afterwards, you add 4 to both sides of the equation. 2x = 6
Divide both sides by 2. x = 3
Answer:
1/2
Step-by-step explanation:
type it into the calculator
Answer:
A. -8<=y<=6
Step-by-step explanation:
The defensive area is 510 square yards
Step-by-step explanation:
Let L be the length of the rectangle
and
W be the width
According to given statement
L = 2W-15
Perimeter = 270
Dividing both sides by 6
We have to find the area first to find the defensive area
So,
Defensive area = 3/25 of total area
So,
Hence,
The defensive area is 510 square yards
Keywords: Area, Rectangle
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