How do you factor 6r + 8- r + 8r + 9r ^ { 2} + 3?
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Answer:
Step-by-step explanation:
6r + 8- r + 8r + 9r ^ { 2} + 3
=9r²+13r+11
here a=9,b=13,c=11
discrimination D=b²-4ac=13²-4(9)(11)
=169-396= -227
so r=1/18[-13±√-227]
r=-13/18±√-227/18
r=-13/18±i√227/18 ( here i=√-1)
r+13/18+i√227/18 and r+13/18-i√227/18
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