Question

4 . C )

Dau coroniță !!! Urgent !!!​

Answer 1

Răspuns:

Explicație pas cu pas:

4x²-4x=4x(x-1}  ; b)  h=l√3/2=4√3/2=2√3 ;  c)   sin 60=√3/2 ;   tg 30=√3/3 ;       (√3/2+√3)/√3/3=3√3/2×3/√3=9/2

Answer 2

Răspuns:

a)4x(x-1)

b)

$2 \sqrt{3}$

c)

$\frac{9}{2}$

Explicație pas cu pas:

a)

$4{x}^{2} - 4x = 4x(x - 1)$

b)

$h = \frac{ l\sqrt{3} }{2 } = \frac{4 \sqrt{3} }{2} = 2 \sqrt{3}$

c)

$\frac{ \frac{ \sqrt{3} }{2 } }{ \frac{ \sqrt{3} }{3} } + \frac{ \sqrt{3} }{ \frac{ \sqrt{3} }{3} } = \frac{ \frac{3 \sqrt{3} }{2} }{ \frac{ \sqrt{3} }{3} } = \frac{3 \sqrt{3} }{2} \times \frac{3}{ \sqrt{3} } = \frac{9}{2}$