3 years ago

-4 1/2x - 3/7= 1/4find x

1 answer:

7 0

- 4(1/2)x - (3/7) = (1/4)
- 4(1/2)x = (1/4) + (3/7)
- (9/2)x = (7+12)/28
-(9/2)x = 19/28
x = (19/28) * 2 / 9
x = (19/14) / 9
x = 19 / (14*9)
x = 19 / 126

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3 years ago

Factorise the following x^4+x

Ostrovityanka [42]

Answer:

$\large\boxed{x^4+x=x(x^3+1)=x(x+1)(x^2-x+1)}$

Step-by-step explanation:

$x^4=x\cdot \underbrace{x\cdot x\cdot x}_{3}=x\cdot x^3\\\\x=x\cdot 1\\\\x^4+x=\bold{x}\cdot x^3+\bold{x}\cdot1=\bold{x}\cdot(x^3+1)\\\\\text{used the distriburtive property:}\ a(b+c)=ab+ac$