This is Daniela’s work to solve the equation 13 x + 42 = 276. 13 x + 42 = 276. 13 x = 318. x = 24 and StartFraction 6 Over 13 EndFraction. Which property did Daniela need to use to avoid her error? division property of equality multiplication property of equality subtraction property of equality identity property of equality

6(h+1)/2=a

a=area

step-by-step explanation:

its the same thing as a square or rectangle but after multiplying two sides you need to divide it by two.

let's call the solutions x₁ = (5 - 2√7)/3 and x₂ = (5 + 2√7)/3

then the equation is (x-x₁)(x-x₂) = 0

if you fill that in you get a lot of numbers which you can recognize as ax²+bx+c=0.

step-by-step explanation:

you can see that a=1 (there is just an x²)

b = (-5 -2√7 + 2√7 - 5)/3 = -10/3

c = -2√7)/3 ) * (-5+2√7)/3) = -1/3

so your answer is 3x^2 – 10x – 1 = 0