Math Problem Statement

Solve it

Solve the non-perfect squares

Solution

Let's solve these equations one by one. Each involves solving for xx where the right-hand side is not a perfect square. Here's how we approach them:

1. (x+3)2=7(x + 3)^2 = 7

  1. First, take the square root of both sides: x+3=±7x + 3 = \pm \sqrt{7}

  2. Now, solve for xx: x=3±7x = -3 \pm \sqrt{7}

So, the two possible solutions for this equation are: x=3+7orx=37x = -3 + \sqrt{7} \quad \text{or} \quad x = -3 - \sqrt{7}

2. (x2)2=11(x - 2)^2 = 11

  1. Take the square root of both sides: x2=±11x - 2 = \pm \sqrt{11}

  2. Solve for xx: x=2±11x = 2 \pm \sqrt{11}

Thus, the solutions are: x=2+11orx=211x = 2 + \sqrt{11} \quad \text{or} \quad x = 2 - \sqrt{11}

3. (x+4)2=18(x + 4)^2 = 18

  1. Take the square root of both sides: x+4=±18x + 4 = \pm \sqrt{18}

  2. Simplify 18\sqrt{18} to 323\sqrt{2}: x+4=±32x + 4 = \pm 3\sqrt{2}

  3. Solve for xx: x=4±32x = -4 \pm 3\sqrt{2}

So, the solutions are: x=4+32orx=432x = -4 + 3\sqrt{2} \quad \text{or} \quad x = -4 - 3\sqrt{2}

4. (x5)2=20(x - 5)^2 = 20

  1. Take the square root of both sides: x5=±20x - 5 = \pm \sqrt{20}

  2. Simplify 20\sqrt{20} to 252\sqrt{5}: x5=±25x - 5 = \pm 2\sqrt{5}

  3. Solve for xx: x=5±25x = 5 \pm 2\sqrt{5}

The solutions are: x=5+25orx=525x = 5 + 2\sqrt{5} \quad \text{or} \quad x = 5 - 2\sqrt{5}

5. (x+2)2=13(x + 2)^2 = 13

  1. Take the square root of both sides: x+2=±13x + 2 = \pm \sqrt{13}

  2. Solve for xx: x=2±13x = -2 \pm \sqrt{13}

So, the solutions are: x=2+13orx=213x = -2 + \sqrt{13} \quad \text{or} \quad x = -2 - \sqrt{13}


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Math Problem Analysis

Mathematical Concepts

Algebra
Square Roots
Equations with Radicals

Formulas

(x + a)^2 = b
x = ±√b - a

Theorems

Square Root Property

Suitable Grade Level

Grades 8-10