3 years ago

F(x)=0 if f(x)=-8x^2+6x+5

Mathematics

1 answer:

gogolik [260]3 years ago

5 0

Use the quadratic formula
x=(-b(+-) sqrt(b^2-4*a*c))/2a
(-6(+-)sqrt 36-4*-8*5)/-16
x=20/16-(5/4)
x=8/16-(1/2)

You might be interested in

The value of y varies directly with x, and y=10 when x=4. Find x when y=14.

damaskus [11]

$y=10\ \ \ and\ \ \ x=4\\\\
y=14\ \ \ and\ \ \ x=?\\\\
Making\ ratio:\\
10-4\\14-x\\\\
Cross\ multiplication:\\
10x=4*14\\
10x=56\ \ \ |Divide\ by\ 10\\x=5,6\\\\solution\ is\ x=5,6.$

5 0

2 years ago

I need to find the Missing angle of this equilateral triangle

Marysya12 [62]

Answer:

X...................

5 0

3 years ago

Read 2 more answers

Solve the equation for x. <br><br> x + 13 = 22

AveGali [126]

X=22-13
x=9
Ya. . . . .

6 0

2 years ago

Read 2 more answers

Find the unit rate.

kati45 [8]

The answer is A divided 200 by 4 and get 50

4 0

3 years ago

Read 2 more answers

Solve 4/9x+7=1/2.<br><br> Solve 1/8x−12=3/4.

Elenna [48]

$\# 1 \\\\ \frac{4}{9}x+7=\frac{1}{2} \\\\ \frac{4x}{9}=\frac{1}{2}-7^{(2} \\\\ \frac{4x}{9}=\frac{1-14}{2} \\\\ \frac{4x}{9}=-\frac{13}{2} \\\\ 4x=-\frac{9*13}{2} \\\\ x=-\frac{\frac{9*13}{2}}{4} \\\\ x=-\frac{117}{2}*\frac{1}{4} \\\\ \boxed{x=-\frac{117}{8}=-14\frac{5}{8}}$

$\#2 \\\\ \frac{1}{8}x-12=\frac{3}{4} \\\\ \frac{1}{8}x=\frac{3}{4}+12^{(4} \\\\ \frac{x}{8}=\frac{3+48}{4} \\\\ \frac{x}{8}=\frac{51}{4} \\\\ x=\frac{\not8*51}{\not4} \\\\ x=2*51 \\\\ \boxed{x=102}$

4 0

3 years ago

Read 2 more answers