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2 years ago

Find the value of:3x^2+2x-4When x=4

Mathematics

2 answers:

Marina CMI [18]2 years ago

6 0

3x² + 2x - 4

=》x = 4

Substitute the value of 'x' in the expression.

3x² + 2x - 4

= 3(4)² + 2(4) - 4

= 3(16) + 8 - 4

= 48 + 8 - 4

= 56 - 4

= 52

_______

Hope it helps ⚜

a_sh-v [17]2 years ago

3 0

Refer to the attachment!

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I need help on this.

patriot [66]

Answer:

2143-764=1379

Step-by-step explanation:

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2 years ago

Find the vertex of the graph of the function. f(x) = 2x^2 - 8x + 9

Rashid [163]

$\bf \textit{vertex of a vertical parabola, using coefficients} \\\\ f(x)=\stackrel{\stackrel{a}{\downarrow }}{2}x^2\stackrel{\stackrel{b}{\downarrow }}{-8}x\stackrel{\stackrel{c}{\downarrow }}{+9} \qquad \qquad \left(-\cfrac{ b}{2 a}~~~~ ,~~~~ c-\cfrac{ b^2}{4 a}\right) \\\\\\ \left(-\cfrac{-8}{2(2)}~~,~~9-\cfrac{(-8)^2}{4(2)} \right)\implies \left( \cfrac{8}{4}~~,~~9-\cfrac{64}{8} \right) \\\\\\ (2~~,~~9-8)\implies (2~~,~~1)$

5 0

3 years ago

Need help<br> Please<br> Thank

Kay [80]

Step-by-step explanation:

I don't know what exactly the Question

but I tried to simplify to get the answer.

So Katherine , just write some words in the solution. ( that's what I understood).

7 0

3 years ago

How many fifts are in 11

Xelga [282]

There are 55 fifths in 11.

11 x 5 = 55

55/5 = 11

Hope that helped :D

4 0

3 years ago

What is the factored for of the polynomial x^2 - 12x + 27

vodomira [7]

Answer:

(x - 3)(x - 9)

Step-by-step explanation:

Consider the factors of the constant term (+ 27) which sum to give the coefficient of the x- term (- 12)

The factors are - 3 and - 9, hence

x² - 12x + 27 = (x - 3)(x - 9 )

8 0

2 years ago

Find the value of:3x^2+2x-4When x=4​

Find the value of:3x^2+2x-4When x=4