*x Algebra
Solve equations, factor expressions, and simplify terms.
Algebra is arithmetic with unknowns: this category holds the solvers for linear and quadratic equations plus the factoring helpers. Each tool shows its working so the answer arrives with the method attached.
- Linear Equation SolverSolve a·x + b = c for x
- Quadratic Equation SolverSolve a·x² + b·x + c = 0 with the quadratic formula
- Exponential Growth CalculatorContinuous growth: A = P·e^(r·t)
- Natural Log Calculatorln(x) — logarithm base e
- Common Log Calculatorlog₁₀(x) — logarithm base 10
- Scientific Notation ConverterExpress a number as mantissa × 10^n
- Significant Figures CalculatorRound a number to n significant figures
Frequently asked questions
What order should I learn algebra topics in?
Linear equations first, then quadratic ones, with factoring and simplifying as support skills along the way. The ladder works because each rung reuses the previous one — the quadratic formula is a disciplined way to finish what the linear approach begins.
How do I solve a linear equation step by step?
Isolate x by undoing operations in reverse order: subtract constants from both sides, then divide by the coefficient. For 2x + 4 = 10, subtracting 4 gives 2x = 6 and dividing gives x = 3 — exactly the example on the linear equation page.
When do I need the quadratic formula?
When x squared refuses to disappear: once the equation holds both x2 and x terms, the remove-then-divide chain stops reaching a clean answer. The formula reads the three coefficients and delivers both roots at once, real or complex.