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(ii) 6x2 - 3-7x |
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Answer» =6x²-7x-3=6x²+2x-9x-3=2x(3x+1)-3(3x+1)=(2x-3)(3x+1)⇒2x-3=0 ⇒3x+1=0⇒x=3/2 ⇒ x= - 1/3α=3/2 ,β= - 1/3⇒α+β= -b/a⇒3/2+(-1/3)= - (-3)/6⇒3/2-1/3=1/2⇒7/6 =1/2⇒αβ=c/a⇒3/2(-1/3)= -7/6⇒-1/2= -7/6⇒1/2=7/6 |
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