Question

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

Answer 1

Answer:

X(2x-1)+5

2x²-x+5

if X=2

2(4)-2+5

8-2+5

6+5

11

I hope it help u

Answer 2

$\sf{{Given:-}}$

$\sf{{x=2}}$

$\sf{{To}}$$\sf{{Find:-}}$

• $\sf{{x(2x-1)+5}}$

$\sf{{Solution:-}}$

$\sf{{x(2x-1)+5}}$

$\implies \sf{{2x^{2}-x+5}}$

Now,

As we know x = 2

Substitute the value of x

$\sf{{2(2)^{2}-2+5)}}$

$\sf{{=2(4)-2+5}}$

$\sf{{=8-2+5}}$

$\sf{{=8+5-2}}$

$\sf{{=13-2}}$

$\sf{{=11}}$

Let us do the verification now :-

$\sf{{x(2x-1)+5}}$

⟹ $\sf{{2x^{2}-x+5=11}}$

⟹ $\sf{{2x2−x+5−11=11−11}}$

⟹ $\sf{{2x2−x−6=0}}$

⟹ $\sf{{(2x+3)(x−2)=0}}$

$\sf{{2x+3=0}}$$\sf{{or}}$$\sf{{x-2=0}}$

x=$\sf\dfrac{-3}{2}$or x = $\sf{{2}}$

Hence, verified.

✵ Required Answer ✵

Value of x(2x-1)+5 = 11