Question

Алгебра все формулы пж помогите по 9 классам

Answer 1

a2=a1+d;

a3=a2+d;

a4=a3+d;

a5=a4+d;

Answer 2

Algebra Formulas for 9th Grade

In 9th grade algebra, students learn various formulas and concepts that are fundamental to understanding algebraic principles. Here are some important algebra formulas for 9th grade:

Quadratic Formula: The quadratic formula is used to solve quadratic equations of the form ax^2 + bx + c = 0. The formula is:

x = (-b ± √(b^2 - 4ac)) / (2a)

This formula is used to find the roots of a quadratic equation.

Slope-Intercept Form: The slope-intercept form of a linear equation is given by y = mx + b, where m is the slope and b is the y-intercept.

Distance Formula: The distance formula is used to find the distance between two points (x1, y1) and (x2, y2) in a coordinate plane. The formula is:

d = √((x2 - x1)^2 + (y2 - y1)^2)

This formula is derived from the Pythagorean theorem and is used to calculate the distance between two points in a coordinate plane.

Quadratic Equations: Quadratic equations are equations of the form ax^2 + bx + c = 0. These equations can be solved using the quadratic formula or by factoring.

Exponents and Radicals: In 9th grade algebra, students learn about exponents and radicals, including rules for simplifying expressions with exponents and solving equations involving radicals.

Systems of Equations: Students learn about solving systems of linear equations, both graphically and algebraically. This includes methods such as substitution, elimination, and graphing.

Inequalities: Students also learn about solving and graphing linear inequalities, as well as solving systems of linear inequalities.

These are some of the fundamental algebra formulas and concepts that are covered in 9th grade algebra.

If you have specific questions about any of these formulas or concepts, feel free to ask for further clarification!