x^2+3x−14=<14

pezgirl79u

pezgirl79u

Answered question

2022-10-12

x 2 + 3 x - 14 14

Answer & Explanation

elulamami

elulamami

Beginner2022-10-13Added 22 answers

First solve f(x) = 0 by the new Transforming Method.
Factor pairs of -28. Roots have different signs
Proceed: (--2, 14)(-4, 7). This sum is 3 = b. Therefor, the 2 real roots are the opposite: x = 4 and x = -7.
Next, plot (-7) and (4) on a number line. The parabola opens upward (a > 0), then, between the 2 x-intercepts,f(x)≤0.
Answer by closed interval: [-7, 4]

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