Question

(5x+y). (x-3y) por favor, me ajudemm

Answer 1

(5x+y). (x-3y) ^ para expoentes ex: x^2 = x²

5x^{2} -15x.y +x.y -3y^{2}

5x^{2} -14x.y -3y^{2}

substitua:

x=y^{2}

5(y^{2} )^{2} -14(y^{2} ).y -3y^{2}

5y^{4} -14y^{3} -3y^{2}

y^{2} ( 5y^{2} -14y -3)=0

y^{2} =0

x=0

5y^{2} -14y -3 =0

Δ=(-14)^{2} -4.5.-3

Δ= 196 +60

Δ= 256

y=(-14+-√Δ)/ 2.5

y =(-14+-√256)/2.5

y' =(-14+16)/10

y'=1/5

y"= (-14-16)/10

y"= -30/10

y"= -3

x=y^{2}

x'"=(1/5) ^{2}

x"'=1/25

x""=(-3)^{2}

x""=9