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Square roots
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1) 39²
Firstly split it
(30+9)²
(30+9)(30+9)
30×30+30×9+9×30+9×9
900+270+270+81
=>1521
2) 42²
(40+2)²
(40+2)(40+2)
40×40+40×2+2×40+2×2
1600+80+80+4
=>1764
HOPE IT HELPS U.
Firstly split it
(30+9)²
(30+9)(30+9)
30×30+30×9+9×30+9×9
900+270+270+81
=>1521
2) 42²
(40+2)²
(40+2)(40+2)
40×40+40×2+2×40+2×2
1600+80+80+4
=>1764
HOPE IT HELPS U.
ReebaSid:
it really helped a lot Thanks
❤️
No need mate
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