Using the formula of (a + b)²,find (i) (2x + 3y)² (ii) 103²
Answers
Answered by
19
Answer:
(a+b)²= a² +2ab+ b²
(2x × 3y )²= (2x)²+2 (2x) (3y) + (3y)²
= 4x² + 12 xy + 9y²
103²=(100+3)²
= (100)²+ 2 (100)(3) +(3)²
= 10000+ 600+ 9
=10609
Answered by
7
Answer:
(i) 4x² + 9y²+ 12xy (ii) 10609
Step-by-step explanation:
(i) (2x + 3y)²
= (2x)²+ (3y)²+ 2×2x×3y
= 4x² + 9y²+ 12xy
(ii) 103²
=(100 + 3)²
=(100)² + (3)² + 2×100×3
= 10000 + 9 + 600
= 10609
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