42 + 21 x 2 = 84
7x6 21x2 14x3 10.5x4 8.4x5
40-42+5 -2+5 3 3 is the answer
42 = 2 × 3 × 7
Its 42 (2x21)=42 (7x6)=42 (21x2)=42
No, 21 is not prime.
67
No, 2 x 3 x 7 = 42
(x + 3)(7x^2 + 1)
Interesting and very difficult to put into x amount of letters.
21x2 - 31x + 8 = (3x - 8)(7x - 1)
y = 3x + 21x2 = 3x(1 + 7x)
you are almost there, you must split it one more time. 21 is divisible by 7 and 3, so the prime factorization of 42 is 7x3x2