Question

Solve 2x^2 - 20 = 3x.

Answer 1

THere are many ways my prefer way is to use quadratic formula.

Depending on what they want u to use tho they may not like it. BUT

2x2 - 20 = 3x

2x2 - 20 - 3x=0
just subtract 3x from both sides.

2x2 - 3x -20 =0
rearrange

now use quadratic equation

ax2 + bx +c =0
2x2 - 3x -20

Answer 2

I mean use quadratic formula

Answer 3

https://gfbrandenburg.files.wordpress.com/2011/09/quadratic-formula.jpg

Answer 4

2 is a
-3 is b
-20 is c

Can you handle that :)

Answer 5

\[2x^{2}-20=3x\]

Answer 6

\[2x ^{2}-3x-20=0\]

Answer 7

\[2x ^{2}-8x+5x-20=0\]

Answer 8

\[2x(x-4)+5(x-4)=0\]
\[\therefore (2x+5)(x-4)=0 \rightarrow x=-2.5 or 4\]