For the expression 5x?y3 xy2 8 to be a trinomial with a degree of 5, the missing exponent on the x-term must be .
2 answers:
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<h3>First Method:</h3>
<u>Using cosine rule</u>:
<u>First find XY using sine rule</u>:
Then use Pythagoras Theorem:
⇒ XY² + YZ² = XZ²
⇒ (6)² + YZ² = 12²
⇒ YZ² = 144 - 36
⇒ YZ = √108
⇒ YZ = 6√3
⇒ YZ = 10.4