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lina2011 [118]
4 years ago
15

2xsquared +3x-20=0 solve using quadratic formula

Mathematics
2 answers:
rosijanka [135]4 years ago
8 0

2x² + 3x - 20 = 0

2x² + 8x - 5x - 20 = 0

2x(x+4) - 5(x+4) = 0

(x+4)(2x-5) = 0

x+4 = 0

x = -4

2x - 5 = 0

2x = 5

x = 5/2

Ghella [55]4 years ago
6 0

Answer:

\frac{5}{2} ; -4

Step-by-step explanation:

2x² + 3x - 20 = 0

a = 2 ; b = 3 ; c = -20

[ -b ± √(b² - 4ac) ] /2a = [-3±√(3²-4*2*-20]/2*2

                                 = [-3±√(9+160)]/4

                                = [-3±√169 ]/4

                                = [-3± 13]/4

                                = \frac{-3+13}{4}   ;\frac{-3-13}{4}\\\\=\frac{10}{4}      ; \frac{-16}{4}\\\\=\frac{5}{2} , -4

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Answer:

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Kindly award branliest

Step-by-step explanation:

Let the mass of a clay pot be x

Let the mass of a metal pot be y

Thus; 2x + 2y = 13.2

And ;

x = 3 times y

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1 year ago
Which graph correctly solves the system of equations below? y = −x2 + x + 7 y = x2 + 3x + 7
antiseptic1488 [7]

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Step-by-step explanation:

We can easily solve this question by using a plotting tool or any graphing calculator,

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y1 = −x^2 + x + 7

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Please, see attached picture below.

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kumpel [21]

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Step-by-step explanation:

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Hope this helps :D (paraphrased; no plagiarism)

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