Since neither y = 9 nor y = 5 makes the LCD zero , these
are both solutions.
• The hypotenuse in a right triangle is the side opposite the 90 degree angle in
• Pythagorean theorem: a2 = b2 + c2, where a is
the length of the hypotenuse in a right triangle and b and c are the
lengths of the other two sides .
• For a quadratic y = f(x) = ax2 + bx + c, we have
• x-intercepts: determine these by using the quadratic formula
NOTE: If b2 − 4ac < 0 then there are no x-intercepts (they are not
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