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3 years ago

PLS HELP .........................

Mathematics

1 answer:

Otrada [13]3 years ago

5 0

Answer:

I believe the answer is C :)

Step-by-step explanation:

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Find the area. Will mark brainliest.

leva [86]

Answer:

784

Step-by-step explanation:

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3 years ago

Read 2 more answers

What are the solutions of x^2-2x+5=0

sweet [91]

The solution of $x^{2}-2 x+5=0$ are 1 + 2i and 1 – 2i

Solution:

Given, equation is $x^{2}-2 x+5=0$

We have to find the roots of the given quadratic equation

Now, let us use the quadratic formula

$x=\frac{-b \pm \sqrt{b^{2}-4 a c}}{2 a}$ --- (1)

Let us determine the nature of roots:

Here in $x^{2}-2 x+5=0$ a = 1 ; b = -2 ; c = 5

$b^2 - 4ac = 2^2 - 4(1)(5) = 4 - 20 = -16$

Since $b^2 - 4ac < 0$ , the roots obtained will be complex conjugates.

Now plug in values in eqn 1, we get,

$x=\frac{-(-2) \pm \sqrt{(-2)^{2}-4 \times 1 \times 5}}{2 \times 1}$

On solving we get,

$x=\frac{2 \pm \sqrt{4-20}}{2}$

$x=\frac{2 \pm \sqrt{-16}}{2}$

$x=\frac{2 \pm \sqrt{16} \times \sqrt{-1}}{2}$

we know that square root of -1 is "i" which is a complex number

$\begin{array}{l}{\mathrm{x}=\frac{2 \pm 4 i}{2}} \\\\ {\mathrm{x}=1 \pm 2 i}\end{array}$

Hence, the roots of the given quadratic equation are 1 + 2i and 1 – 2i

6 0

3 years ago

alexandr1967 [171]

Answer:

Traingle LKJ is similar to triangle LMK is similar to triangle KMJ

Step-by-step explanation:

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2 years ago

80% of what number is 15

joja [24]

X time 0.8 (or 80 percent)= 15
so 15/0.8=X
18.75

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3 years ago

Select all the numbers that belong to the special sequence of square numbers.

ipn [44]

answer:

169

81 =9²

169=13²

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3 years ago