Answer:
No se nesesito puntos perdon
Multiply each term in one bracket by each in the other:
<span>(I assume x2 means x^2 / x squared) </span>
<span>(x^2 + 3x + 1)(x^2 + x + 2) </span>
<span>= x^4 + x^3 + 2x^2 + 3x^3 + 3x^2 + 6x + x^2 + x +2 </span>
<span>Now collect all terms: </span>
<span>= x^4 + 4x^3 + 6x^2 + 7x + 2 </span>
Answer:
Step-by-step explanation:
Rewrite this equation in standard quadratic form: x^2 + 13x + 4 = 0.
Here the coefficients are 1, 13 and 4, so the discriminant is
b^2-4ac, or 169 - 4(1)(4) = 153
Since the discriminant is + there are two real, unequal roots. They are:
-13 ± √153
x = ------------------
2
x = ----------------
Given: sin theta = 2/5. This tells us that the lengths of the opp side and the hyp are 2 and 5 respectively. The adj side is found using the Pyth. Thm.: 5^2-2^2= 25-4 = 21, so that the adj side is sqrt(21).
The double angle formula for the sine is sin 2theta = 2 sin theta *cos theta.
In this particular problem, the sine of 2theta is 2*(2/5)*[sqrt(21) / 5], or:
(4/25)*sqrt(21).