Physics, asked by gulnazfatma093, 7 months ago

Please answer it step by step solution
any useless answer will be reported
I NEED STEP BY STEP RIGHT SOLUTION​

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Answered by padawalepragati04
1

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 :)

Answered by Anonymous
6

Answer:

\huge\bold\star\red{Answer}\star

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

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