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Quadratic Equations — Mathematics STD 10 — Question

ICSE BoardEnglish MediumSTD 10MathematicsQuadratic Equations1 Mark
MCQ
The solution of the equation $x^2+x+1=1$ is:
  • ✓
    $x=0,-1$
  • B
    $x=-1,2$
  • C
    $x=0,1$
  • D
    cannot be determined
✓

Answer

Correct option: A.
$x=0,-1$
(a) $x=0,-1$
Explanation:
Given equation is
$\begin{array}{l}x^2+x+1=1 \\ \Rightarrow x^2+x=0 \\ \Rightarrow x(x+1)=0 \\ \Rightarrow x=0 \text { or } x+1=0 \\ x=0 \text { or } x=-1 .\end{array}$

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