Solve -1+2^2+4c(-1)+c-1=0

$$- 1 + 2 ^ { 2 } + 4 c ( - 1 ) + c - 1 = 0$$

Solve for c

$$c=\frac{2}{3}\approx 0.666666667$$

Steps for Solving Linear Equation

Calculate 2 to the power of 2 and get 4.

$$-1+4+4c\left(-1\right)+c-1=0$$

Add -1 and 4 to get 3.

$$3+4c\left(-1\right)+c-1=0$$

Multiply 4 and -1 to get -4.

$$3-4c+c-1=0$$

Combine -4c and c to get -3c.

$$3-3c-1=0$$

Subtract 1 from 3 to get 2.

$$2-3c=0$$

Subtract 2 from both sides. Anything subtracted from zero gives its negation.

$$-3c=-2$$

Divide both sides by -3.

$$c=\frac{-2}{-3}$$

Fraction \frac{-2}{-3} can be simplified to \frac{2}{3} by removing the negative sign from both the numerator and the denominator.

$$c=\frac{2}{3}$$