book Maths Puzzle Numerical Ability

use the discriminant to determine how many real number solutions the quadratic equation -4j2 + 3j - 28 = 0 has. please and thank you!!!

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book Other Question

the width of a rectangle is half as long as the length. the recrangle has an area of 32 square feet. what is the width? Find the LCD of the given rational expressions and convert each expression to an equivalent rational expression with LCD as the denominator.

7a over 24x^5 y^2 , 5b over 16x^2 y^