Please answer it step by step solution
any useless answer will be reported
I NEED STEP BY STEP RIGHT SOLUTION
Answers
Answer:
15 sq.units
Explanation:
Area of Parallelogram= |A×B|
= (3i^ + 2j^) × (-3i^ + 7j^)
= (3i^ × -3i^)+(3i^ × 7j^)+(2j^ × -3i^)+(2j^ × 7j^)
=(0)+ (21)(-k^) + (-6)(-k^) +(0)
= -21 k^ + 6k^
= -15k^
Area of Parallelogram=|-15k^|
= 15 sq.units
FORMULAE USED:
In Cross-Multiplication,
(i×i)=(j×j)=(k×k)=0
(i×j)=k (j×i)=-k
(j×k)=i (k×i)=-i
(k×i)=j (i×k)=-j
Hope you understood :)
Answer:
15 sq.units
Explanation:
Area of Parallelogram= |A×B|
= (3i^ + 2j^) × (-3i^ + 7j^)
= (3i^ × -3i^)+(3i^ × 7j^)+(2j^ × -3i^)+(2j^ × 7j^)
=(0)+ (21)(-k^) + (-6)(-k^) +(0)
= -21 k^ + 6k^
= -15k^
Area of Parallelogram=|-15k^|
= 15 sq.units
FORMULAE USED:
In Cross-Multiplication,
(i×i)=(j×j)=(k×k)=0
(i×j)=k (j×i)=-k
(j×k)=i (k×i)=-i
(k×i)=j (i×k)=-j