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BartSMP [9]
3 years ago
9

So I solved this thing up to the point where I have x^2-x-42=0 but i have no idea how to find x from here? I mean I should but I

don't?​

Mathematics
2 answers:
Ann [662]3 years ago
5 0

Answer: x = 7

Step-by-step explanation:

x(x-1) = 42 (Area)

By trial and error method let's take x = 7

We get

7(7-1) = 42

7 x 6 = 42

42 = 42

Therefore LHS = RHS

Therefore it's 7

Hope this helps

Mark me brainliest so that my rank increases!

Temka [501]3 years ago
5 0

Answer:

x = - 6 , x = 7

Step-by-step explanation:

given

x² - x - 42 = 0

Consider the factors of the constant term (- 42) which sum to give the coefficient of the x- term ( - 1)

The factors are - 7 and + 6, since

- 7 × + 6 = - 42 and - 7 + 6 = - 1, hence

x² - x - 42 = (x - 7)(x + 6) and so

(x - 7)(x + 6) = 0

Equate each factor to zero and solve for x

x - 7 = 0 ⇒ x = 7

x + 6 = 0 ⇒ x = -6

Solutions are x = - 6, x = 7

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4 years ago
a cab company charge s a flat rate of $2 plus and additional $0.50 for every mile traveled when Sara arrived at her destination
Cerrena [4.2K]
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3 years ago
(3.8 x 10 ^ -6) x (2.37 x 10 ^ -3)<br><br> Enter the answer in science notification
Black_prince [1.1K]

Multiply the coefficients and the powers of 10 with each other:

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The numeric part simply yields

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3 years ago
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noname [10]

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Step-by-step explanation:

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4 years ago
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3/5 x 3 = 9/5

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