(-3) to the power 4 × 7 to the power 4
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⏩(-3)⁴ × 7⁴
A negative base raised to an even power equals a positive..
→3⁴ × 7⁴
Multiply the terms with equal exponents by multiplying the bases...
→(3×7)⁴
Multiply the numbers..
→21⁴
Evaluate the power..
→ 194481
The required solution...
✔✔✔✔✔✔
Hope it helps...:-)
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