Question

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Answer 1

Explanation:

Answer 1.

x²-225 = 0

x² = 225

X = √225

X = +15 or -1 -15

Answer 2.

289 - a² =0

289 = a²

a = √289

a = +17 Or -17.

Answer 3.

450-2x²

450 - 2x² = 0

450 = 2x²

x² = 450/2

x² = 225

X = 15 or 15

Answer 2

${a}^{2} - {b}^{2} = (a + b)(a - b \: where \: a \: = x \: and \: b = 15. \: (x + 15)(x - 15)$