x=2/3and x= - 3are roots of the quadratic eqn ax²+7x+b find values of a and b
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from the above equ compare to a quardatic eqution we find that c/a=2/3*_3=_2 so c=_2a now _b/a=2/3_3=_7/3 so_7/a=_7/3 so a =3 so c=b=_2*3=_6
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_ this denotes negative sin
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