Asked by Anonymous
Find the interval for b such thtat the equation has a t least one real solution.
i. X^2+bx-6=0
ii. 2X^2+bx-7=0
iii. x^2+bx+3=0
iv. 3x^2+bx+5
i. X^2+bx-6=0
ii. 2X^2+bx-7=0
iii. x^2+bx+3=0
iv. 3x^2+bx+5
Answers
Answered by
Steve
what, no ideas? Check the discriminant.
ax^2+bx+c has only complex roots if b^2-4ac < 0
ax^2+bx+c has only complex roots if b^2-4ac < 0
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