Question

(x+3)²=2x(x+7) Bhaskara

Answer 1

x²+6x+9 = 2x²+14x
x²-2x²+6x-14x+9 = 0
-x²-8x+9 = 0 .(-1)
x²+8x-9 = 0
/\ = 8² - 4.1.(-9)
/\ = 64 + 36
/\ = 100
x = (-8+/-\/100)/2
x = (-8+/-10)/2
x' = (-8+10)/2 = 2/2 = 1
x" = (-8-10)/2 = -18/2 = -9

Answer 2

x²+6x+3²=2x²+14x
x²+6x+9-2x²-14x=0
-x²-8x+9 a=-1  b=-8  c=9
Delta=(-8)²-4.-1.9
Delta=64+36
Delta=
x=-(-8)+-raiz quadrada de 100/-2
x=8+-10/-2
x1=-10/-2
x1=5
x2=8+10/-2
x2=18/-2
x2=-9