Question

a)x²+3x=0

b)x²-5x=0

c)x²+6x=0

d)x²+x=0

f)x²-13x=2x

ma ajuaaaaaaaaaa



resolva as equações acima ☝️kk ​

Answer 1

Explicação passo-a-passo:

a)

${x}^{2} + 3x = 0 \\ \\ x(x + 3) = 0 \\ \\ \Large \boxed{ \green{\: x = 0 }}\\ \\ ou \\ \\ x + 3 = 0 \\ \\ \Large \boxed{ \green{\:x = - 3}}$

b)

${x}^{2} - 5x =0 \\ \\ x(x - 5) = 0 \\ \\ \Large \boxed{ \green{\:x = 0} }\\ \\ ou \\ \\ x - 5 = 0 \\ \\ \Large \boxed{\green{\: x = 5}}$

c)

${x}^{2} + 6x =0 \\ \\ x(x + 6) = 0 \\ \\ \Large \boxed{\green{\:x = 0}} \\ \\ ou \: \\ \\ x + 6 = 0 \\ \\ \Large \boxed{\green{\:x = - 6}}$

d)

${x}^{2} + x = 0 \\ \\ x(x + 1) = 0 \\ \\ \Large \boxed{ \green{\:x = 0 }}\\ \\ ou \\ \\ x + 1 = 0 \\ \\ \Large \boxed{\green{\:x = - 1}}$

f)

${x}^{2} - 13x = 2x \\ \\ {x}^{2} - 13x - 2x = 0 \\ \\ {x}^{2} - 15x = 0 \\ \\ x(x - 15) = 0 \\ \\ \Large \boxed{\green{\: x = 0}} \\ \\ou \\ \\ x - 15 = 0 \\ \\ \Large \boxed{\green{\:x = 15}}$

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