1tzM3
20.10.2020 •
Mathematics
11. 2x2 -50 = x^2 -1 solve by factoring
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Ответ:
I think Its either x=7 or x=−7
Hope this helps! :)
Step-by-step explanation:
Let's solve your equation step-by-step.
2x2−50=x2−1
Step 1: Subtract x^2 from both sides.
2x2−50−x2=x2−1−x2
x2−50=−1
Step 2: Add 50 to both sides.
x2−50+50=−1+50
x2=49
Step 3: Take square root.
x=±√49
x=7 or x=−7
Ответ:
(
2
x
2
−
18
)
=
(
x
√
2
+
√
18
)
(
x
√
2
−
√
18
)
=
=
(
x
√
2
+
√
9
⋅
2
)
(
x
√
2
−
√
9
⋅
2
)
=
=
(
x
√
2
+
3
√
2
)
(
x
√
2
−
3
√
2
)
=
=
√
2
(
x
+
3
)
√
2
(
x
−
3
)
=
2
(
x
+
3
)
(
x
−
3
)
Step-by-step explanation:
Ответ:
Yes.
The degree will be m+n