pls help me with this whoever answers this first will be marked brainlist (and i want a PROPER answer)
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15. 8³×7³
4²×14²
= (2³)³×7³
(2²)²×(2×7)²
= 2⁹×7³
2⁴×2²×7²
= 2⁹×7³
(2^4+2)×7²
= 2⁹×7³
2⁶×7²
= (2^9-6)(7^3-2)
= 2³×7
= 8 × 7
= 56
16. (-2)⁷¹ × (-2)¹⁷ = (-2)^2y
=> (-2)^71+17 = (-2)^2y
=> (-2)⁸⁸ = (-2)^2y
=> 88 = 2y. (-2 is cancelled)
=> y = 88/2.
=> y = 44
I hope this answer helps you.
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