MATHEMATICS HIGH SCHOOL

Calculate the discriminant.

x2 + 2x – 2 = 0 

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Answer 1
Answer: x^2 + 2x - 2 = 0 \n \n a=1 , \ b=2 , \ c= -2\n \n \Delta = b^(2)-4ac = 2^(2)-4*1* (-2)= 4+8=12 \n \n√(\Delta )=\1{12}= √(4*3)=2√(3)\n \nx_(1)=(-b-√(\Delta ))/(2a) =(-2-2√(3))/(2)=(2(-1-√(3)))/(2) =-1-√(3) \n \nx_(2)=(-b+√(\Delta ))/(2a) =(-2+2√(3))/(2)=(2(-1+√(3)))/(2) =-1+√(3)

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