Question

Ex (1) Subtract : 5a2 - 2a from 7a² + 5a + 6.​

Answer 1

5a² - 2a from 7a² + 5a + 6

(7a²+5a+6) - (5a²-2a)

=7a²+5a+6 - 5a² +2a

=2a² +7a +6

Answer 2

$\sf subtract \: 5 {a}^{2} - 2a \: from \: 7 {a}^{2} + 5a + 6$

Solution

$\sf \implies(7 {a}^{2} + 5a + 6) - (5 {a}^{2} - 2a)$

$\implies \sf \: 7 {a}^{2 } + 5a + 6 <strong>- 5 {a}^{2} + 2a </strong>\\ <strong>- 5 {a}^{2} + 2a \\ \sf \implies \: 7 {a}^{2} - 5 {a}^{2} + 5a + 2a + 6 \\ </strong><strong>- 5 {a}^{2} + 2a \\ \sf \implies \: 7 {a}^{2} - 5 {a}^{2} + 5a + 2a + 6 \\ \implies \sf \: 2 {a}^{2} + 7a + 6$