Question

Verify the identity (x + a)(x + b) = x2 + (a + b)x + ab for a = 2, b = 3 and x = 4​

Answer 1

Answer:

$l.h.s = (4 + 2)(4 + 3). \\ = 6 \times 7. \\ 2. \\ r.h.s = 16 + 5 \times 4 + 6. \\ = 16 + 26. \\ = 42.$