factorise 42-r-r^2
please answer this as soon as possible
Answers
Answered by
7
Answer:
Step-by-step explanation:
42-r-r^2
r^2 + r- 42
r^2 + 7r - 6r - 42
r(r +7) - 6( r + 7)
(r-6) (r+7)
hope it helps you!!
Answered by
0
Answer:
42−x−x
2
⇒−[x
2
+x−42]
⇒−[x
2
+7x−6x−42]
⇒−[(x+7)(x−6)]
⇒
(x+7)(6−x)
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