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3 years ago

PLEASE HELP only answer if you really know: what is the quadratic formula?

Mathematics

2 answers:

Nadusha1986 [10]3 years ago

4 0

Answer:

a formula that gives the solutions of the general quadratic equation

Step-by-step explanation:

Really just the general formula that gives the solutions

formula: x2 + bx + c = 0 and that is usually written in the form x = (-b ± √(b2 − 4ac))/(2a)

Sergeu [11.5K]3 years ago

4 0

A formula that gives the solutions of the general quadratic equation ax2 + bx + c = 0 and that is usually written in the form x = (-b ± √(b2 − 4ac))/(2a)

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28 POINTS BRAINLIEST

Arisa [49]

Answer:

The roots can be seen from the graphs as - 4 and +4

The equation is :

x² - (sum of roots) + (product of roots)

Equation is x² -16

I hope you got it

7 0

4 years ago

Which statement is not always true for a parallelogram?

VARVARA [1.3K]

<h3>Answer: B. Diagonals are congruent.</h3>

Explanation:

If the diagonals are congruent, then we'd have a rectangle. Any rectangle is a parallelogram, but not the other way around.

If we had a non-rectangular parallelogram, with none of the angles 90 degrees, then the diagonals will not be the same length.

Choices A, C and D are true for any parallelogram (rectangle or not).

3 0

3 years ago

The arc of the parabola y = x^2 from (3,9) to (4,16) is rotated about the y-axis. Find the area of the resulting surface. Please

Hitman42 [59]

Answer:

156.5

Step-by-step explanation:

Thinking process:

The area can be calculated using the formula:

$S = \int\limits^4_3 {2\pi x\sqrt{1+}(2x)^{2} } \, dx$

We let the substitution take place.

Therefore, we let $u = 1 + 4x^{2}$

Thus, $du = 8dx.$

So,

$xdx = \frac{1}{8}du$

Also, the interval of the integration changes to [ 37, 65]

Thus,

$S = \int\limits^4_3 {2\pi \sqrt{1+4x^{2} } } \, dx \\= \int\limits^65_35 {2\pi \sqrt{\frac{1}{8}u } } \, dx$

= $\frac{1}{6} [ 65^{\frac{3}{2}-37^{\frac{3}{2} } }$

= 156.5 units²

8 0

3 years ago

Which expressions can be simplified as StartFraction 625 Over n Superscript 12 Baseline EndFraction? Check all that apply.

ra1l [238]

Answer:

A and E

Step-by-step explanation:

(5n^-3)^4= A (25n^-6)^2=E

5 0

3 years ago

Read 2 more answers

Please Help me! Thankkss

weeeeeb [17]

The answer will be
8317000

3 0

4 years ago

Read 2 more answers