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3 years ago

-4x ²-3x+2=0 can you help me solve this

Mathematics

1 answer:

Romashka-Z-Leto [24]3 years ago

5 0

Answer:

x = (-3 ±√41)/8

Step-by-step explanation:

When you match your equation to the form ...

... ax² +bx +c = 0

you can see that ...

a = -4
b = -3
c = 2

These are the values you use in the quadratic formua to find the solutions for x.

... x = (-b ±√(b²-4ac))/(2a) . . . . . . the quadratic formula

... x = (-(-3) ±√((-3)² -4(-4)(2)))/(2(-4)) . . . . fill in a, b, c

... x = (3 ±√(9+32))/(-8) . . . . simplify a bit

... x = (-3 ±√41)/8 . . . . . . put the minus sign in the numerator

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−2x−8y=10

Vilka [71]

Answer:

Um hahahahahhahahahahahahhaha

4 0

3 years ago

What is the nth term rule of the linear sequence below 1,7,13,19,25

zysi [14]

First you see how it goes up 6 each time this is the start of your nth term rule
6n
Then -6 from the first term to get the ‘0th term’ 1-6=-5
So nth term rule is
6n-5
hope this helps

4 0

3 years ago

If y = 3x^3 - 2x and dx/dt equals 3, find dy/dt when x = -2. Give only the numerical answer. For example, if dy, dt = 4, type on

Nadya [2.5K]

Answer:

$\frac{dy}{dt} = 102$

Step-by-step explanation:

step(i)

Given function y = 3 x³ - 2 x ... (i)

Differentiating equation (i) with respective to 'x'

$\frac{dy}{dx} = 3 (3 x^{2} ) - 2(1)$

Given x = -2

$(\frac{dy}{dx} ) x_{=-2} = 3 (3 (-2)^{2} ) - 2(1)$

$(\frac{dy}{dx} ) x_{=-2} = 36 -2 =34$

Step(ii):-

we know that

$\frac{dy}{dx} = \frac{\frac{dy}{dt} }{\frac{dx}{dt} }$

Given $\frac{dx}{dt} = 3 and \frac{dy}{dx} = 34$

$\frac{dy}{dx} = \frac{\frac{dy}{dt} }{\frac{dx}{dt} }$

substitute values $\frac{dx}{dt} = 3 and \frac{dy}{dx} = 34$

⇒ $34 = \frac{\frac{dy}{dt} }{3 }$

cross multiplication , we get

$\frac{dy}{dt} = 34( 3 ) = 102$

Final answer:-

$\frac{dy}{dt} = 34( 3 ) = 102$

8 0

3 years ago

How can you write repeating decimals as fractions?

Burka [1]

Rewrite the decimal as a fraction by putting that number as the numerator and the denominator would be how many times the number has repeated originally.

I hope this helped you!

3 0

3 years ago

-104= 8x please help 4 people are stuck on this

skelet666 [1.2K]

Answer:

8x = -104

divide 8

x = 13

7 0

3 years ago