Răspuns:
x²=4a
10²=4a
4a=100=>a=100:4=>a=25
x²-3a=x+3
(-2)²-3a=-2+3
4-3a=1
3a=4-1
a= 3:3=1
Salutare!
A)
[tex] \bf {x}^{2} = 4a[/tex]
[tex] \bf x = 10 \implies{10}^{2} = 4a[/tex]
[tex]\bf 100 = 4a \: \: \bigg|: 4[/tex]
[tex] \boxed{\boxed{\bf a = 25}}[/tex]
B)
[tex] \bf {x}^{2} - 3a = x + 3[/tex]
[tex] \bf { (- 2)}^{2} - 3a = - 2 + 3[/tex]
[tex] \bf 4 - 3a = 1[/tex]
[tex] \bf 4 = 1 + 3a[/tex]
[tex] \bf 4 - 1 = 3a[/tex]
[tex]\bf 3 = 3a \: \: \bigg|: 3[/tex]
[tex] \boxed{ \boxed{\bf a = 1}}[/tex]
==pav38==
