Trinomial 2x² + 4x + 4.
It's of the form ax²+bx+c and it's discriminant is Δ=b² - 4.a.c
(in our case Δ = 4² - (4)(2)(4) → Δ = - 32
We know that: x' = -1 + i and x" = -1 - i
If Δ > 0 we have 2 rational solutions x' and x"
If Δ = 0 we have1 rational solution x' = x"
If Δ < 0 we have 2 complex solutions x' and x", that are conjugate
In our example we have Δ = - 16 then <0 so we have 2 complex solutions
That are x'= [-b+√Δ]/2.a and x" = [-b-√Δ]/2.a
x' =
Answer:
15
Step-by-step explanation:
3x+15=60
3x=45
x=15
Answer:
-22z
Step-by-step explanation:
-8z - 14z = -22z // Addition ( - - = +)
<span>7.71(–0.02)
</span><span>0.23(–1.1)
</span><span>–5.09(8.1)
The reason is because a negative * positive will always give a negative answer. Negative * negative and positive * positive will always have a positive answer.</span>
Do a proportion. 28/100= 7/x. Now cross multiply and divide. 7 x 100=700 and 700 divided by 28 is 25. There are 25 students in the class. Answer is 25
