Question

$(7t - 4)(7t + 5)$
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Answer 1

${Using}\:{Identity}\: ({x}-{a})({x}+{b}) = {x}^{2}+(b-a)x + ab$

$(7t - 4)(7t + 5) = {7t}^{2}+(5-4)7t+(-4×5)= {49t}^{2} + 7t - 20$

$I\: HOPE\: IT\: HELP\: YOU.$

Answer 2

(7t - 4)(7t + 5)

7t ( 7t+5) -4 (7t+5)

49t^2 + 35t -28t -20

49t^2 7t - 20