Hey, i've been doing a maths practice paper for revision but i've come across a question i don't understand. Can anyone help me??
Find the exact roots of the equation 2x(squared)+8x-5=0 giving your answers in their simplest form.
The answer is -2(plus or minus)1/2 (square root) 26
but i just keep getting -2(plus or minus) (square root) 24
:S i don't know where i'm going wrong
Thanks for your help
xx