Question

(b) 15 x [3 x (-12)] = (15 X 3) x - 12
(d) -12 x [(-7) +5] = (-12) × (-7) + (-12) x 5​

Answer 1

Step-by-step explanation:

b sol :

15 x [3 x (-12)] = (15 X 3) x - 12

LHS = 15 × [ 3 × -12 ]

= 15 × - 36

= - 540

RHS = ( 15 × 3 ) × - 12

= 45 × - 12

= - 540

Therefore, LHS = RHS....

d sol :

-12 x [(-7) +5] = (-12) × (-7) + (-12) x 5

LHS = - 12 × ( - 7 + 5)

= - 12 × - 2

= 24

RHS = (-12) × (-7) + (-12) x 5

= ( - 12 × - 7 ) + ( - 12 × 5 )

= ( 84 ) + ( - 60 )

= 84 - 60

= 24

Therefore, LHS = RHS....

Answer 2

Answer:

1

15×[3×(-12) = (15×3) ×-12

15×3×-12 = 15×3×-12

15×-36 = 15×-36

-540 = -540