Question

12 less than twice the square of a number is equal to the product of -5 and the number. What are the solutions?

a) {-3/2 , -4}
b) { -3/2, 4}
c) {3/2, 4}
d) {3/2, -4}

Answer 1

d
\2[x^2-12=-5x\]
\[2x^2+5x-12=0\]

Answer 2

\[2x^2-12=-5x\]
\[2x^2+5x-12=0\]
\[(x+4)(2x-3)=0\]
etc

Answer 3

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