Question

Roots of the equation x2 + 0.9 are:

(a) Imaginary Roots
(b) Rational Roots

(c) Irrational Roots
(d) None of the above​

Answer 1

$\huge\orange{{A\; is \;the \;answer}}$

• b²- 4ac = ∆ is used to determine nature of roots in a quadratic equation ax²+bx+c
• Here , a = 1 , b = 0 , c = 0.9
• ∆ = 0²-4(1)(0.9)
• ∆ = -3.6
• ∆ < 0
• Imaginary roots

$\large{\red{\underline{Note}}}$

• If ∆ = 0 , Real and equal roots
• If ∆ > 0 , Real and distinct roots
• If ∆ < 0 , imaginary roots

Answer 2

Answer:

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