Looking for HSC notes and resources? Check out our Notes & Resources page

Maths question to solve (1 Viewer)

Thread starter 2323
Start date Aug 12, 2012

2

2323

Member

#1

Does anyone know how to solve

2^2x -6(2^x) + 8 = 0

U

U MAD BRO

Member

#2

quad formula then solve for x from 2^x

Sy123

This too shall pass

#3

$2^{2x}-6 \cdot 2^x+8=0 \\ $let$ \ \ u=2^x \\ u^2-6u+8=0 \\ (u-4)(u-2)=0 \\ u=4 \ \ \ u=2 \\ \\ 2^x=4 \ \ \ 2^x=2 \\ x=2 \ \ x=1$

M

mathaesthetics

New Member

#4

^

You must log in or register to reply here.

Share:

Facebook Twitter Reddit Pinterest Tumblr WhatsApp Email Link

Users Who Are Viewing This Thread (Users: 0, Guests: 1)

Top