Question

What is the solution to the equation 2 ^(1 + 2x) = 3 ?

A) x ? -0.292
B) x ? -0.185
C) x ? 0.185
D) x ? 0.292

Answer 1

x=-9

Answer 2

The first thing you have to do here is to move the 21 to the left side, to do this, we can substract 21 to all sides
\[21+2x-21 = 3-21\]\[2x = -14\]

Answer 3

2x would equal -18

Answer 4

Then divide by 2 to all sides,
\[2x = -18\]\[2x \div 2 = -18 \div 2\]\[x = -9\]

Yeah right, -18, not -14, what was I thinking..