Which equation shows one way to find the value of 63 × 15? 63 × 15 = (7 × 9) × (3 × 5) = (7 + 3) × (9 + 5) = 10 × 14 = ? 63 × 15 = (7 × 9) × (3 × 5) = (7 × 3) × (9 × 5) = 21 × 45 = ? 63 × 15 = (7 × 9) × (3 × 5) = (7 + 9) × (3 + 5) = 16 × 8 = ? 63 × 15 = (7 × 9) × (3 × 5) = (35 × 5) × (45 × 3) = 105 × 135 = ?

First step is to get rid of the square root. remember that a square root is the same as raising to the (1/2) power. see below: multiply exponents per exponent rules to get: remember you subtract exponents from the denominator and add exponents in the numerator so: simplify further: so a is the correct choice. if you don't understand this google exponent rules and it will you understand. look at the image results.