Question

. Find the solutions of 4x2+8x - 9 = 0 by completing the square.​

Answer 1

Answer:

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Answer 2

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factoring  4x2 + 8x + 9  

The first term is,  4x2  its coefficient is  4 .

The middle term is,  +8x  its coefficient is  8 .

The last term, "the constant", is  +9  

Step-1 : Multiply the coefficient of the first term by the constant   4 • 9 = 36  

Step-2 : Find two factors of  36  whose sum equals the coefficient of the middle term, which is   8 .

     -36    +    -1    =    -37  

     -18    +    -2    =    -20  

     -12    +    -3    =    -15  

     -9    +    -4    =    -13  

     -6    +    -6    =    -12  

     -4    +    -9    =    -13