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How can you use the discriminant in deciding whether a quadratic equation can be solved by factoring ​

There are 20.5 litres of juice in 27 boxes of either 0.7 or 0.9 litres . how many juice boxes of 0.7 liters are there?

Which statement is true about the factorization of 30x2 + 40xy + 51y2? the polynomial can be rewritten after factoring as 10(3x2 + 4xy + 5y2). the polynomial can be rewritten as the product of a trinomial and xy. the greatest common factor of the polynomial is 51x2y2. the greatest common factor of the terms is 1.