B Find the root of 7x² +5x-18=0
by factorisation
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Answer:
-2 and 9/7
Step-by-step explanation:
7x²+5x-18=0
7x²+14x-9x-18=0
7x(x+2)-9(x+2)=0
(x+2)(7x-9)=0
hence, the roots are
x=-2 and x=9/7
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