(3x + 1/2x)^2
help me to solve this
I need step - by - step explanation...
Answers
Answered by
2
Step-by-step explanation:
(3x)²+(1/2x)²+2*1/2x*3x
9x²+1/4x²+3x²
32x²+x²+12x²/4
45x²/4
Answered by
2
Identity: (a ± b)² = a² ± 2ab + b²
(3x + ½ x)²
= (3x + x/2)²
= (3x)² + 2(3x)·(x/2) + (x/2)²
= 9x² + 3x² + x²/4
= 12x² + x²/4
= (48 + 1)/4 x²
= 49/4 x² (answer).
ALITER:
(3x + x/2)²
= (7x/2)²
= 49/4 x².
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