Your a=4, b=-3 and c=-2. So, . The answer has to be .
Hi Happy New Year everyone hope you all have had a good one........ I'm doing Maths on New Years Day ..... I'm having a bit of trouble with quadratic equations using a formula. I am using the formula to solve the equations but when I substitute the answers back in the equation the answers don't work....
This is the equation :
I use the formula :
x = -b ± √ b² - 4ac
I substitute the letters for the numbers in the formula so that it looks like
x = - - 3 ± √ -3² - 4 x 4 x -2
2 x 4
x = 3 + 4.80
x = 3 - 4.80
Can someone please tell me where I'm going wrong
I am stating roots correct to 2 dp
I think I might be doing something wrong somewhere, I seem to be getting answers that don't make sense when I apply the formula to the equation, for instance take :
2x² - 7x = 3
The exercise I am doing is asking me to solve this equation using a formula... I'm not sure if this is where I am going wrong but I use
a= 2 b= -7 c= 0 ????
I then get
x = - (-7)± √ -7² - 4x2x0
2 x 2
The answer I get from this does not make sense, x = 7 ± √ -49
please help and if possible could someone explain where I am going wrong in my calculation
Happy New Year....... Again