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evablogger [386]
3 years ago
14

10 Using the quadratic formula to solve x2 = 5 – X, what are the values of x?

Mathematics
1 answer:
loris [4]3 years ago
6 0

x^2 = 5 - x

x^2 + x - 5 = 0

-1 +/-\frac{ \sqrt{ {1}^{2} - 4(1 \times  - 5) } }{2}

x = (1 + √21) / 2

x = (1 - √21) / 2

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Answer        

Find out the Area of a triangle .

To proof  

Formula

Area of Triangle

= \frac{1}{2}\times( {x_1(y_{2}-y_{3}) +x_{2}(y_{3} - y_{1})+x_{3}(y_{1}-y_{2})})

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= -10 units²

(Neglected the negative sign as area cannot be negative.)

= 10 units ²

Area of  a triangle is 10 units ²

Hence proved

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There were two cheesecakes in the fridge. The first cheesecake was cut into 16 slices and there are 3 slices left. The other che
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