Matematică, întrebare adresată de mariancatalin721, 8 ani în urmă

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Răspuns de veronicabumbac5
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8) a) x=-2√2 x²=(-2√2)²=4√4=4×2=8

b) x=-4√3 x²=(-4√3)²=16×3=48

c) x=-5√5 x²=(-5√5)²=25×5=125

d)x=5×2√6-2×3√6=10√6-6√6=4√6

x²=(4√6)²=16×6=96

e) x=10×2√7-7×3√7=20√7-21√7=-√7

x²=(-√7)²=7

f) x=7×4√5-10×3√5=28√5-30√5=-2√5

x²=(-2√5)²=4×5=20

9) a) x=3√2 x³=(3√2)³=27√8=27×2√2=54√2

b)x=3√3 x³=(3√3)³=27√27=27×3√3=81√3

c) x=4√2 x³=(4√3)³=64√27=64×3√3=192√3

d)x=5×2√3-4×5√3=10√3-20√3=-10√3

x³=(-10√3)³=-1000√27=-1000×3√3=-3000√3

e) x=3×4√6-5×2√6=12√6-10√6=-2√6

x³=(-2√6)³=-8√216=-8×6√6=-48√6

f)x=-3×3√5+2×4√5=-9√5+8√5=-1√5

x³=(-1√9)³=-1×√729=-27

10) a) x=2√3 x²=(2√3)²=4×3=12

b) x=-2√2 x²=(-2√2)²=4×2=8

c) x=3√6-2√6-5√6=-4√6

x²=(-4√6)²=16×6=96

d)x=2×2√5-4√5-3√5=4√5-4√5-3√5=-3√5

x²=(-3√5)²=9×5=45

11) a) x=-2√5 x²=(-2√5)²=4×5=20

b)x=-3√5 x²=(-3√5)²=9×5=45

c) x=4√3-5√3+2×2√3=-1√3+4√3=3√3

x²=(3√3)²=9×3=27

d) x=3×3√2-5√2-7√2=9√2-5√2-7√2=-3√2

x²=(-3√2)²=9×2=18

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