factorise 84 - 2r - 2r^2
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Answered by
5
Answer:
84−2r−2r2
=2(42−r−r2)
=−2(r2+r−42)
=−2(r2+7r−6r−42)
=−2(r(r+7)−6(r+7))
=−2(r+7)(r−6)
=2(r+7)(6−r)
thnks:)hope it helps)))
Answered by
1
84−2r−2r2
=2(42−r−r2)
=−2(r2+r−42)
=−2(r2+7r−6r−42)
=−2(r(r+7)−6(r+7))
=−2(r+7)(r−6)
=2(r+7)(6−r)
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