Question

Using suitable identities, find ( 5.1 × 5.2 )
(b)Show that (3x +7)2  −  84x   =  (3x − 7)2" role="presentation" style="box-sizing: border-box; display: inline-table; font-style: normal; font-weight: normal; line-height: normal; font-size: 14px; text-indent: 0px; text-align: left; text-transform: none; letter-spacing: normal; word-spacing: normal; overflow-wrap: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; border: 0px; padding: 0px; margin: 0px; position: relative;">()ℎ ℎ (3 +7)2  −  84   =  (3 − 7)2(b)Show that (3x +7)2  −  84x   =  (3x − 7)2

Answer 1

Answer:

(i). We have to prove that . Use identity. to solve L.H.S.. Use identity,. , to solve R.H.S.. Thus, . Hence, . (ii). We have to prove that . Use identity. to solve L.H.S.. Use identity,. , to solve R.H.S.. Thus, . Hence, . (iii). We have ...