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nevsk [136]
3 years ago
11

Quadratic equation with root 1 is :-(A) 2x ^ 2 + x - 1 = 0 (B) 2x ^ 2 - x - 1 = 0 (C) 2x ^ 2 + x + 1 = 0 (D) 2x ^ 2 - x + 1 = 0​

Mathematics
1 answer:
ladessa [460]3 years ago
6 0

Answer:

option b is correct

tag me as brilliaiest

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Answer:

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Matt's rectangular patio measures 9 feet by 12 feet. he wants to increase the patio's dimensions so its area will be twice the a
Eva8 [605]

The present dimensions are : length = 12 feet

width = 9 feet

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If the dimensions are increased by x feet the dimensions are :

length = 12 + x

width = 9+ x

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new area = initial area * 2

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x^2+ 21x = 216-108

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x^2 + 21x -108 = 0

let us plug a= 1 b= 21 c= -108 in quadratic formula

x= [-21 + / - ( 21^2 - 4* 1 * -108 )^(1/2 ]/ 2* 1

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