2 years ago

Factor 14x2+6x-7x-3 by grouping

Mathematics

1 answer:

QveST [7]2 years ago

5 0

14x^2+6x-7x-3

14x^-7x +6x-3

group

7x(2x-1) +3(2x-1)

factor out (2x-1)

(2x-1)(7x+3)

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$x=1 \Rightarrow y=-1.5*(1)^2+6 =-1.5+6=-4.5\\ \\ x= 2 \Rightarrow y=-1.5*2^2+6 =-1.5*4+6=-6+6=0\\ \\x=3 \Rightarrow y=-1.5*3^2+6 =-1.5*9+6=-13.5+6=-7.5$