Solve
Solve:
0=(x+3)(x-2)
x=-3, 2
Solve:
2x - 4 = 8
x = 6
What is the quadratic formula?
x=(-b +- sqrt(b^2 - 4ac))/(2a)
Is this a quadratic equation? Explain.
x2 + 6x + 9 = 0
Yes because it is the quadratic form y = ax2 + bx + c where a does not equal zero.
How do you find the perimeter of a rectangle?
Add all the side lengths.
Solve the following quadratic equation.
x^2 + 3x + 2 = 0
x=-2,-1
Solve:
2(x - 4) = 3(x + 1)
x = - 11
Identify a, b and c in the following equation:
x2 + 6x + 5 = 0
a = 1; b = 6; c = 5
Is this a quadratic equation? Explain your answer.
y = 9x3 + x2 - x + 8
No because the first x is cubed.
How do you find the perimeter of a rectangle?
Multiply the length and width.
Solve the following quadratic equation.
x^2 - 6x + 5 = 0
x = 5 ; x = 1
Solve:
10 - 4(x - 1) = 9x
x = 14/13
Identify a, b and c in the following equation:
x2 - 9x + 20 = 9
a = 1; b = -9; c = 11
Is this a linear equation?
x2 - 5x - 24 = 0
No, it is a quadratic equation.
A rectangle has the width of 7 feet and length of 4 feet. What is the perimeter?
22 feet
Solve the following quadratic equation.
x^2 - 6x - 27 = 0
x = 9 ;x = -3
What two things make a linear equation?
1. Equals sign
2. Highest exponent is a 1.
Solve the following quadratic equation by using the quadratic formula: 2x2 + 9x + 4 = 0
Is this a linear equation?
2x +39 = -18x
Yes, it is a linear equation.
A rectangle has the width of 7 feet and length of 4 feet. What is the area?
28 feet2
Solve the following quadratic equation.
2x2 - 5x - 3 = 0
x = -1/2 ,3
Solve:
x - 9 = 0
x = 9
Solve the following quadratic equation by using the quadratic formula: 4x2 - 17x - 15 = 0
What two things must be in a quadratic equation?
1. Equals sign
2. Highest exponent is a 2.
A rectangle has the width of (x +7) feet and length of (x+4) feet. What is the area?
x2 + 11x + 28