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These questions are forwarded from a school email:I'm having trouble with Problems 2c and 2d on the Quadratic Formula sheet2c. 2x^2+4x-7=02d. 3x^2+2x-4=0
Worksheet_07:Exercise:2-c) 2x^2 + 4x - 7 = 0 x = (-4 +- sqrt(4^2 - 4(2)(-7)))/((2)(2)) = (-4 +- sqrt(72))/4 = (-4 +- 6 sqrt(2))4 = (-2 +- 3 sqrt(2))/22-d) 3x^2 + 2x - 4 = 0 x = (-2 +- sqrt(2^2 - 4(3)(-4)))/((2)(3)) = (-2 +- sqrt(52))/6 = (-2 +- 2 sqrt(13))/6 = (-1 +- sqrt(13))/3
These questions are forwarded from a school email:
ReplyDeleteI'm having trouble with Problems 2c and 2d on the Quadratic Formula sheet
2c. 2x^2+4x-7=0
2d. 3x^2+2x-4=0
Worksheet_07:
DeleteExercise:
2-c) 2x^2 + 4x - 7 = 0
x = (-4 +- sqrt(4^2 - 4(2)(-7)))/((2)(2))
= (-4 +- sqrt(72))/4
= (-4 +- 6 sqrt(2))4
= (-2 +- 3 sqrt(2))/2
2-d) 3x^2 + 2x - 4 = 0
x = (-2 +- sqrt(2^2 - 4(3)(-4)))/((2)(3))
= (-2 +- sqrt(52))/6
= (-2 +- 2 sqrt(13))/6
= (-1 +- sqrt(13))/3