#3x^2+18x+27=0#?

2 Answers
Mark D.
Jun 26, 2018

#(3x+9)(x+3)=0#

#3x+9=0 or x+3=0#

#x=-9/3 or x=-3#

#x=-3#

Lucy
Jun 26, 2018

#x=-3#

Explanation:

#3x^2+18x+27=0#

#3(x^2+6x+9)=0#

#x^2+6x+9=0#

#(x+3)^2=0# using the quadratic formula (refer below)

#x=-3#

Quadratic formula is given by:
#x=(-b+-sqrt(b^2-4ac))/(2a)#

#x=(-6+-sqrt(36-36))/(2times1)#

#x=(-6+-0)/2#

#x=-6/2#

#x=-3#

#(x-(-3))(x-(-3))=0#

#(x+3)(x+3)=0#

#(x+3)^2=0#

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