Question

14. If m = -2 and n = 6, find the value of :
2 a. m² + n²
2b. m + 3mn

Answer 1

Step-by-step explanation:

m²+n²= (-2)²+(6)²

=>4+36= 40

2b). m²+3mn=(-2)²+3(6)(-2)

=>4-36= -32

Answer 2

Answer:

$2a. \: m = - 2 \: and \: n = 6 \\ \ {m }^{2} + {n}^{2} = {( - 2)}^{2} + {6}^{2} \\ \: \: = 4 + 36 = 40$

$2b. \: \: m = - 2 \: and \: n = 6 \\ m + 3mn \\ = ( - 2) + 3 \times ( - 2) \times 6 \\ = - 38$