Question

responda:
a)4x2 - 27 = x2
b)8x2 = 60-7x2
c)3(x2 - 1)= x2 +7
d)2(x2 - 1)=x2 +7
e)5(x2 - 1)= 4(x2+1)
f)(x - 3)(x + 4) + 8 = x

Answer 1

4x²-x²=27
3x²=27
x²=27/3
x²=9
x=√9
x=3 e -3
b)8x²+7x²=60
 15x²=60
x²=60/15
x²=4
x=√4
x=2 e -2
c)3x²-3=x²+7
3x²-x²=7+3
2x²=10
x²=10/2
x²=5
x=√5
d)2x²-2=x²+7
2x²-x²=7+2
x²=9
x=√9
x=3 e -3
e)5x²-5=4x²+4
5x²-4x²=4+5
x²=9
x=√9
x=3 e -3
f)x²+4x-3x-12+8=x
x²+4x-3x-x-12+8=0
x²-4=0
x²=4
x=√4
x=2 e -2