Question

x ao quadrado -7x + 10 = 0

Answer 1

A=1 B=-7 C=10

∆=b²-4.A.C

∆=(-7)²-4.1.10

∆=49-40

∆=9

x=-b+-✓∆

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2.A

X=-(-7)+-✓9

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2.1

X=7+- 3

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2

x1= 7+3

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2

x1=5

x2=7-3

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2

x2=2

R=(5,2)