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49
Q:

Find the quadratic equations whose roots are the reciprocals of the roots of 2x2+5x+3?

A)  3x2+5x+2=0   

B) 5x2+3x+2=0 

C) 3x2-5x-2=0   

D)  None



A) A B) B
C) C D) D

Answer:   A) A



Explanation:

The quadratic equation whose roots are reciprocal of 2x2+5x+3=0 can be obtained by replacing x by 1/x.

 

Hence, 2(1/x)(1/x)+ 5(1/x) + 3 = 0

 

=> 3x2+5x+2=0

 

 

Subject: Mathematical Operations
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If 324⊕289 = 35, 441⊕484 = 43, then 625⊕400 = ?

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Q:

If the signs + and / and the numbers 2 and 4 are interchanged, which one of the following four equations would be correct?

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1 780
Q:

1/2 - 1/8 =

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Answer & Explanation Answer: B) 3/8

Explanation:

Now to find the difference in the given fractions, 1/2 - 1/8

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Hence, 1/2 - 1/8 = 3/8.

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11 1479
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5068 / 37 x 4 = ?

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20 2162
Q:

X2+X2 =

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Explanation:

Here the given expression, 

X2 + X2  is an algebraic expression. Here in this expression the terms are like terms. Now to add them, add their coefficients.

Here in the given expression, the like terms are two X2 

Hence, adding their coefficients i.e, 1 + 1 = 2

Therefore, 

 

X2 + X2 = 2X2.

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14 2396
Q:

5x - 6 = 3x - 8

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23 9258
Q:

3 x 3 + 3 - 3 + 3 = ?

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Explanation:

Using BODMAS law,

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= 12 + 3 - 3 + 3

=  9 + 3

= 12

 

Hence, 3 x 3 + 3 - 3 + 3 = 12.

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