Question

simplyfi x( 2x - 1 ) +5 and find its value at x = - 2​

Answer 1

Answer:

$x(2x - 1) + 5 \: \: \: \: \: if \: x = - 2 \\ - 2(2( - 2) - 1) + 5 \\ = - 2( - 4 - 1) + 5 \\ = - 2( - 5) + 5 \\ = 10 + 5 \\ = 15$

Answer 2

$\huge\fbox\pink{Answer}$

$x( 2x - 1 ) +5$

Now, putting the vaue(x= -2)

$= - 2(2 \times - 2 - 1) + 5$

$= - 2( - 4 - 1) + 5$

$= - 2( - 5) + 5$

$= 10 + 5$

$10 \: because \: - \times - = +$

So,

$= 15$

Hope it helps U✌️✌️✌️✌️...