2√2+√50-√98=
2√2+5√2-7√2=
0
15x²-7x-2=0
Δ=(-7)²-4*15*(-2)Δ=49+120
Δ=169
√Δ=13
x₁=(-(-7)-13)/(2*15)
x₁=-6/30
x₁=-1/5
x₂=(-(-7)+13)/(2*15)
x₂=20/30
x₂=2/3
2√2+√50-√98=
2√2+5√2-7√2=
0
15x²-7x-2=0
Δ=(-7)²-4*15*(-2)
Δ=49+120
Δ=169
√Δ=13
x₁=(-(-7)-13)/(2*15)
x₁=-6/30
x₁=-1/5
x₂=(-(-7)+13)/(2*15)
x₂=20/30
x₂=2/3