1 year ago

Decide whether to use factoring, square roots, or completing the square to solve the equation

Mathematics

1 answer:

dlinn [17]1 year ago

4 0

According to the given equation, to solve the equation we have to use the square roots:

$\begin{gathered} (x-7)^2=-9 \\ x-7=\sqrt[]{-9} \\ x-7=\pm3i \\ x=7\pm3i \\ x1=7+3i \\ x2=7-3i \end{gathered}$

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Câu 1: cho hình chóp S.ABC có đáy là tam giác đều cạnh bằng a, cạnh bên SB vuông góc với mặt phẳng (ABC) , SB =2a. Tính thể tích

Maurinko [17]

Answer:

$\frac{\sqrt{3}}{6} a^{3}$ và $\frac{a^{3} }{6}$

Step-by-step explanation:

Câu 1: V = 1/3.2a. $\frac{\sqrt{3}}{4}$ $a^{2}$ = $\frac{\sqrt{3}}{6} a^{3}$

câu 2: Theo đề bài ta có SA là chiều cao và tam giác đáy SBC vuông tại S (hình chóp S.ABC đổi thành chóp A.SBC)

=> V = 1/3 SA.(diện tích tam giác SBC) = 1/3a. $\frac{a^{2} }{2}$ = $\frac{a^{3} }{6}$

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3 years ago

Please i am dying this is A REALLY HARD QUESTION! 1+4=??!?!?!??

lukranit [14]

Use a calculator its 5

8 0

3 years ago

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PLZ HELP I NEED TO PASS MATH LOL, What is the value of the expression (−10)(−7)? Enter your answer in the box.

nikklg [1K]

Two negatives make a positive

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3 years ago

How to solve X^2+36=0

ICE Princess25 [194]

Answer:

x = -6, 6

Step-by-step explanation:

Isolate the variable, x. Find factors of all terms on the left:

x² + 36 = 0

x 6

(x + 6)(x + 6) = 0

Solve for x:

(x + 6) = 0

x + 6 = 0

x + 6 (-6) = 0 (-6)

x = -6

x² + 36 = 0

x -6

(x - 6)(x - 6) = 0

Solve for x:

x - 6 = 0

x - 6 (+6) = 0 (+6)

x = 6

x = -6 , 6.

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4 years ago

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What is the equivalent fraction for 4/8

solmaris [256]

You are able to divide or mutiply both so let's divide. Divide each by four to get1/2. hope this helped.

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4 years ago

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