Question

Em formula de baskhara,e fatoraçao,me ajudem e pra amanhã
${x}^{2} - 14x + 49 = 9$
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Answer 1

x2-14x+49=9

x2-+4x+40

a=1

b=14

c=40

-b+-Vb*2-4.a.c/2.a

14+-V14*2-4.1.40/2.1

14+-V196-4.40/2

14+-V196-160/2

14+-V36/2

14+-6/2

x'=14+6=20/2=10

x"=14-6=8/2=4