Answer
a. 98
b. 98
Work Step by Step
2$x^{2}$
a.
x=7
2$x^{2}$=2$\times$$7^{2}$=2$\times49$=98
b.
x=-7
2$x^{2}$=2$(-7)^{2}$=2$\times49=98$
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