Answers

2016-07-10T22:27:13+08:00
T² + 10t + 9 = 0 t² + 10t = -9 (Move the "9" to the right side) t² + 10t + 25 = -9 + 25 (In ax² + bx + c = 0... Half the "b" you got "5" right? Then squared it... (5)² = 25) t² + 10t + 25 = 16 Factor then... (t + 5)² = 16 Take out the square and square root the "16" t + 5 = √16 t + 5 = ±4 t + 5 = 4 ; t + 5 = -4 t = 4 - 5 t = -4 - 5 tSUB1 = -1 tSUB2 = -9
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