factorise:
4y²-y-14=0
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Answer:
since we know that
D=b^2-4ac
D=(-1)^2-4*4*(-14)
D=1+224
D=225
√D= 15
alpha = -b+✓D/2a
= -1+15/2*4
=14/8
=7/4 = Alpha
Beta = -b-✓D/2a
= -1-15/2*8
= -16/16
= -1 = Beta
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