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Earn +20 ptsQ: What is x-squared minus 8x equals negative 15?
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What is negative 15 minus negative 6?
If you subtract 15 from -6 you get -21. If you worked out the problem on paper, this is what it would look like. -6 - 15 = ? (change the minus to a plus, and change the sign of 15 from positive to negative) -6 + -15 = ? ( now you can add negative 6 plus negative 15 which equals negative 21) -6 + -15 = -21
What is negative 20 minus negative 5?
-20 -(-5) = -15 ie -(-5) = +5 therefore -20 +5 =15 (two double minuses = a positive)
What is Xsquared equals -8x plus 15 using the quadratic formula?
X= 1.567764363, -9.567764363
Find 'a' when xsquared plus ax minus 15 equals 0 has two integer roots?
(x + 1)(x - 15) gives roots of -1 and 15, and a = 14; (x + 5)(x - 3) gives roots of -5 and 3, and a = 2.
What does X equal is 2x minus fifty five equals negative 3x plus 20?
x = 15
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