Question

h) f(x) = 10x+15
j) f(x) = -4x+2
1) f(x) = -5x -6
n) f(x) = -4x+8
p) f(x) = x-7

alguém me ajudaa urgenteee! por favor....

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Answer 1

Resposta:

Explicação passo-a-passo:

h)

$f(x)=10x+15\\10x+15=0\\10x=-15\\\\x=\frac{-15}{10}\\\\x=-\frac{3}{2}$

j)

$f(x)=-4x+2\\-4x+2=0\\-4x=-2\\-1*(-4x)=-1*(-2)\\4x=2\\x=\frac{2}{4}=\frac{1}{2}$

l)

$f(x)=-5x-6\\-5x-6=0\\-5x=6\\(-1)*-5x=(-1)*6\\5x=-6\\x=-\frac{6}{5}$

n)

$f(x)=-4x+8\\-4x+8=0\\-4x=-8\\(-4x)*(-1)=(-1)*(-8)\\4x=8\\\\x=\frac{8}{4}\\\\x=2$

p)

$f(x)=x-7\\x-7=0\\x=7$