There are 2.54 Centimeters in 1 inch how many inches are there in 51.7 centimeters round your answer to the nearest thousandths
1 answer:
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determinant:
(a)
D<0 means there are no real roots. there are two complex roots with imaginary components.
(b) D=16+20=36>0
D>0 means there are two real roots
(c) D = 20^2-4*4*25 = 0
D=0 means there is one real root with multiplicity 2
