Question

Find the value of (3m + n) (m - n + 1) when
(a) m = 5 and n = 3
(b) m = 11 and n = -6​

Answer 1

Answer:

a) 54

b) 486

Step-by-step explanation:

(3m + n) (m - n + 1)

a)

m = 5 n = 3

= (3(5) + 3) (5 - 3 + 1)

= (15 + 3) (2 + 1)

= 18 × 3

= 54

b)

m = 11 n = -6

= (3(11) + (-6)) (11 - (-6) + 1)

= (33 - 6) (11 + 6 + 1)

= (27) × (18)

= 486

Hope you get your answer

Answer 2

Step-by-step explanation:

(a) (3×5 + 3) (5 - 3 + 1)

= (15 + 3) (2 + 1)

= (18 × 3)

= 52

(b) {3×11 + (-6)} {11 - (-6) + 1}

= {33 - 6} {11 + 6 + 1}

= {27 × 18}

= 486