Step-by-step explanation:
factor 4 out of the variable terms, as this helps.
but my approach is simply to define the target and then calculate "backwards".
we want to find
(ax + b)² = a²x² + 2abx + b²
and now we compare with the original equation :
a²x² = 4x²
a² = 4
a = 2
2abx = 16x
2×2×bx = 16x
4b = 16
b = 4
b² = 16, but we have only 3, so we need to subtract 16-3 = 13 from the completed square.
so, our equation is
(2x + 4)² - 13 = 0
(2x + 4)² = 13
2x + 4 = sqrt(13)
2x = sqrt(13) - 4
x = sqrt(13)/2 - 2
Answer:
n2
Step-by-step explanation:i did this last year
Answer:
Solution given:
Right angled triangle ABC is drawn where <C=
we know that
Now
left hand side
Substituting value
distributing power
Taking L.C.M
....[I]
In ∆ABC By using Pythagoras law we get
AB²+BC²=AC²
Substituting value of AB²+BC² in equation [I]
we get
=1
Right hand side
<h3>
<u>proved</u></h3>
Answer:
198 cm³
Step-by-step explanation:
V = π r² h
V = 22/7 × 3² × 7
V = 22/7 × 9 × 7
V = 22 × 9
V = 198 cm³
