The set of values of x ∈ R satisfying the inequality x 2 − 4 x − 21 ≤ 0 is

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The set of values of $x \in \mathbb{R}$ satisfying the inequality $x^2-4 x-21 \leq 0$ is

MathematicsQuadratic EquationAP EAMCETAP EAMCET 2017 (25 Apr Shift 1)

Options:

A ${[3,7]}$
B ${[-3,7]}$
C ${[-7,3]}$
D ${[-7,-3]}$

Solution:

2992 Upvotes Verified Answer

The correct answer is: ${[-3,7]}$

No solution. Refer to answer key.

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