Activity 4: Set me to my standard
Directions: write each quadratic equation in standard form, ax² + bx + c = 0 then identify the values of a, b, and c.
1. X² – 6x–7=0
2. x² –64=0
3. -2x+8 = -9x²
4. x²= 3x+ 10
5. 4x² –2=0
6. 2x (x + 1 ) = 0
7. ( x+ 4) ² = 5
8. (x + 3) (x–3) = x (4x+5)
9. (x + 5) ( x-9) = 21
Directions: write each quadratic equation in standard form, ax² + bx + c = 0 then identify the values of a, b, and c.
1. X² – 6x–7=0
2. x² –64=0
3. -2x+8 = -9x²
4. x²= 3x+ 10
5. 4x² –2=0
6. 2x (x + 1 ) = 0
7. ( x+ 4) ² = 5
8. (x + 3) (x–3) = x (4x+5)
9. (x + 5) ( x-9) = 21
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ANSWER:
STEP BY STEP EXPLANATION:
1. x² - 6x - 7 = 0
a = 1 b = -6 C = -7
2. x² - 64 = 0
a = 1 b = 0 C = -64
3. 9x² - 2x + 8 = 0
a = 9 b = -2 C = 8
4. x² - 3x - 10 = 0
a = 1 b = -3 C = -10
5. 4x² - 2 = 0
a = 4 b = 0 C = -2
6. 2x² + 2x = 0
a = 2 b = 2 C = 0
7. x² + 8x + 11 = 0
a = 1 b = 8 C = 11
8. -3x² - 5x - 9 = 0
a = -3 b = -5 C = -9
9. x² - 4x - 66 = 0
a = 1 b = -4 C = -66