a^2 - b^2 = (a - b)(a + b) to simplify a numeric expression

This type of question, asked 3 times: 17 Jul 2023 S4, 27 Jul 2023 S3, 26 Sep 2025 S3. All 3 questions below, oldest first.

Try each one first, then open its answer.

Question 1
17 Jul 2023 S4
70 $\frac{3.35^2 - 1.25^2}{3.35 + 1.25} = ?$
Tap an option to check your answer.
Question 2
27 Jul 2023 S3
67 $\frac{7.35 \times 7.35 - 2.25 \times 2.25}{0.24}$
Tap an option to check your answer.
Question 3
26 Sep 2025 S3
51 $(34.12)^2 - 7396$
Tap an option to check your answer.