Question

Please help, i’ve never been good at this.

Answer 1

x=4, x=-10

Explanation:

Answer 2

4

Explanation:

As per Pythagorean theorem:

• 10² = (x+2)² + (x+4)²
• 100 = x² + 4x + 4 + x² + 8x + 16
• 100 = 2x² + 12x + 20
• 80 = 2x² + 12x
• 40 = x² + 6x
• x² + 6x - 40 = 0

Solving we get positive root of:

• x = 4