<p>Hey, I just took the SAT and there was only 1 problem that I didn’t get. Here it is:</p>
<p>x^2(3x-1) = a + bx + sx^2 + tx^3</p>
<p>a, b, s, and t are constants</p>
<p>what it a + b + s+ t?</p>
<p>The answer I got was 2, but I am not really sure.</p>
<p>Yes! You got it right</p>
<p>Since the equation is correct for all values of x
Try number 1
1(2)= a+b+s+t</p>
<p>Did it say it was right for all values of x? can’t remember.</p>
<p>@adeljanevic - It doesn’t have to say it. They are stipulating it is a true equation as is, and when there are no ranges stated it is understood that it is true for all values of x.</p>
<p>0 + 0 - 1 + 3 = 2.</p>