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grandepapi99 grandepapi99
  • 12-08-2016
  • Mathematics
Answered

can any help me please

can any help me please class=

Verified Answer :

Panoyin
Panoyin Panoyin
  • 12-08-2016

a = 8i + 6j
b = 4i + 5j

ab = (8i + 6j)(4i + 5j)
ab = 8i(4i + 5j) + 6j(4i + 5j)
ab = 8i(4i) + 8i(5j) + 6j(4i) + 6j(5j)
ab = 32i² + 40ij + 24ij + 30j²
ab = 32i² + 64ij + 30j²
ab = <32, 30>

The answer is D.

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