3 years ago

Solve for x in the equation x2+14 x+17=-98

Mathematics

2 answers:

sesenic [268]3 years ago

7 0

Answer:

Step-by-step explanation:

x²+14x+17=-98

add 98 to each side

x²+14x+115=0

Solve with quadratic formula

a=1

b=14

c=115

\frac{-14 ±\sqrt{14^2-4*1*115} }{2*1}

Softa [21]3 years ago

4 0

Answer:

x=−7+√130 or x=−7−√130

Step-by-step explanation:

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Answer:

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Step-by-step explanation:

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3 years ago

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3 years ago

Find the x-intercept(s) of y = 2x2 - 3x - 5. A) -5 B) 2 1/2, -1 C) 3, -5 D) 5, -1

Alexus [3.1K]

Answer:

$\large\boxed{B)\ 2\frac{1}{2},\ -1}$

Step-by-step explanation:

x-intercepts are for y = 0.

We have the equation:

$y=2x^2-3x-5$

Therefore

$2x^2-3x-5=0\\\\2x^2+2x-5x-5=0\\\\2x(x+1)-5(x+1)=0\\\\(x+1)(2x-5)+0\iff x+1=0\ \vee\ 2x-5=0\\\\x+1=0\qquad\text{subtract 1 from both sides}\\\boxed{x=-1}\\\\2x-5=0\qquad\text{add 5 to both sides}\\2x=5\qquad\text{divide both sides by 2}\\\boxed{x=2\frac{1}{2}}$