7-5 Quadratic Formula

In the equation
y = x² +5x +7, match each leading coefficient with its correct letter 

• a=0, b=5, c=7
• a=1, b=5, c=7
• a=7, b=5, c=1

Tags

CCSS.HSA.SSE.A.1

What should you do first in solving this equation?
x² + 6x - 13 = 3

• Get factored form
• Write down: a=1, b=6, c=-13
• Make it equal 0 by subtracting 3 on each side
• Type it all in a calculator.

Tags

CCSS.HSA-REI.B.4B

Identify the 'c' value: y = 16x² -8x -24

• 16
• -8
• 24
• -24

Tags

CCSS.HSA.SSE.A.1

Solve Using the Quadratic Formula

2x² + 7x - 15 = 0

• x = -1.5, x = 5

• No Solution

• x = -5, x = 1.5

• x = 0.7, x = 5

Use the quadratic formula to find the solutions for

y = 3x³ + 8x - 1

• x = 0.1167 and x = -2.7833

• x = .7 and x = -16.7

• x = .35 and x = -8.35

• x = 0.2358 and x = -1.236

Solve Using the Quadratic Formula

x² + 4x - 40 = -8

• x = -10 & x = -4

• x = -4 & x = 10

• x = -8 & x = 4

• x = 8 & x = -4

Use the quadratic formula to solve 2x² + 2x - 12 = 0?

• x = -2, x = 3

• x = 2, x = 3

• x = 2, x = -3

• x = -2, x = -3

If you use the quadratic formula to solve an equation and the number under the square root is negative, you will have....

• two real solutions

• one real solution

• no real solutions