How to change it ? Can show the steps or explain it thanks

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1 Answer
Jim G.
Nov 1, 2017

#x=0" or "x=-1#

Explanation:

#"following on from factorising"#

#"equate each factor to zero and solve"#

#"using the "color(blue)"laws of exponents"#

#•color(white)(x)a^0=1#

#•color(white)(x)a^(-n)hArr1/a^n#

#rArr2^x-1=0rArr2^x=1rArrx=0#

#rArr2.2^x-1=0#

#rArr2.2^x=1rArr2^x=1/2rArrx=-1#

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