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Published byAmanda Pintérné Modified over 5 years ago
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Bellwork: 3/6/18 Solve using square roots: 1) x2+8=29 Solve by factoring: 2) x2+6x =40
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Grades: End of the quarter soon! Quiz this Friday Midterm Test next Thursday How can you improve?
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Solving Quadratic Equations- Quadratic Formula
Solve quadratic equations by using the
Quadratic Formula. Determine the number of solutions of a
quadratic equation by using the discriminant.
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To the tune of "Pop Goes the Weasel"
"x equals opposite of b, plus or minus square root of b squared minus 4ac all over 2a"
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Solve using the Quadratic Formula.
6x2 + 5x – 4 = 0 2 – 5x2 = –9x x2 = x + 20 –3x2 + 5x + 2 = 0
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2x2 –3x + 4 = 0 x2 – 4x = -4 x2 + 3x – 7 = 0 –3x2 + 5x + 2 = 0
Solve using the Quadratic Formula. x2 – 4x = -4 x2 + 3x – 7 = 0 –3x2 + 5x + 2 = 0 2x2 –3x + 4 = 0 2 – 5x2 = –9x
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Bellwork: 3/8/18 Solve using any method: 1) 3x2+6= 15 2) 10x2+17x+3=0
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discriminant
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Find the number of solutions of each equation using the
discriminant.
3x2 – 2x + 2 = 0 2x2 + 11x + 12 = 0 x2 + 8x + 16 = 0
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Find the number of solutions of each equation using the
discriminant.
x2 + 4x + 4 = 0 2x2 – 2x + 3 = 0 x2 – 9x + 4 = 0
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Solve using any method –14 + x2 = 5x x2 + 7x + 10 = 0
Solve x2 – 9x + 20 = 0. –14 + x2 = 5x x2 + 7x + 10 = 0 2x2 + 4x – 21 = 0
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x2+6x = 4
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Bellwork: 3/13/18 1) Use the quadratic formula to solve for x: 8x2-11x =3 2) Where is the vertex of the equation: y= (x-7)2+6 ?
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Bellwork: 3/15/18 Factor: 1) x2-8x+7 2) 9x3+36x7
Midterm today! You'll need your calculator and a couple pieces of scratch paper
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