Every day at noon, a bus leaves for townville and travels at a speed of x kilometers per hour. today, the bus left 30 minutes late. if the driver drives 7/6 times as fast as usual, she will arrive in townsville at the regular time. if the distance to townville is 280 kilometers, what is the value of x

a4 - 3a2 - 1

step-by-step explanation:

step   1   :

equation at the end of step   1   :

  ((a4) -   3a2) -   1

step   2   :

trying to factor by splitting the middle term

2.1     factoring   a4-3a2-1  

the first term is,   a4   its coefficient is   1 .

the middle term is,   -3a2   its coefficient is   -3 .

the last term, "the constant", is   -1  

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step-by-step explanation: